The Aussie media have decided that today's close shave shows that their team's hope of lifting a third World Cup are toast unless they get David Pocock back in the XV sharpish.
"The fate of the Wallabies' World Cup chances now rest on the condition of David Pocock's calf," say the Sydney Morning Herald.
They go on. For Scotland. and the rest of the northern hemisphere contenders, the tournament ends here.
Still two mouth-watering semi-finals to look forward to.
See you there.
Beale tops Aussie stats
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Has Kurtley Beale done enough to keep the full-back spot that he borrowed from an injured Israel Folau this afternoon?
Folau has been short of his best in the tournament so far and Beale made more metres (54) and carries (14) than any other Australian.
Did the referee get it wrong?
LOTS of current and former players think so.
Denton prominent
Australia 35-34 Scotland
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David Denton had a massive game in the loose for Scotland.
The number eight made 58 metres, 15 carries, two clean breaks and beat three defenders - all team-high totals.
Heartbreaking
Brian O'Driscoll sums up the heartache for Scotland.
Australia 35-34 Scotland
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Scotland prop Alasdair Dickinson, speaking to BBC Sport: "I don't know what to say. It was a heartbreaking game. I honestly thought we had it until the last minute.
"We've not really discussed the referee's decision. It's still very raw. The decision's made and we have to live with it. We're gutted.
"We've laid a platform for the future. Everybody was writing us off for this game, and we felt we could win it. We probably should have edged it today. but it's a fine line in rugby."
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Australia 35-34 Scotland
John Beattie
Former Scotland international on BBC Radio 5 live
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"I think World Rugby have to tell us why the referee ran off the pitch. Was he being threatened by Scotland players? I don't think so. Was a bottle thrown at him? Well, that's one idiot in the crowd. If he ran off because he got the decision wrong, then that is a disgrace.
"We lost the game, but the referee was a numpty. When you're Scotland, it feels as if we're the little nation, and the big guys get the decisions. But I might be wrong."
Australia 35-34 Scotland
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Australia fly-half Bernard Foley, telling BBC Sport about his thoughts before kicking the winning points: "I think I was telling the team I owed them one after giving them the charge down earlier. I don't know if I've got ice-cool nerves. I'd rather not be kicking them right at the death.
"There is a lot of character in this side. Even when we were behind with five minutes to go, we knew we had a chance. But credit goes to Scotland.
"I haven't seen the replay of the penalty incident. I just take it on the ref's call."
Semi-final line-up
After 44 matches, we have our final four and not a single northern hemisphere team in sight.
To think they shortened the Rugby Championship to make calendar space for this World Cup.
They could have played another round and handed out the Webb Ellis trophy there and then.
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Australia 35-34 Scotland
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Australia 35-34 Scotland
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Scotland fly-half Greig Laidlaw, speaking to BBC Sport: "I don't know what to say. It's hard to take in that manner, to lose it at the death. We're gutted to lose and to lose in that manner.
"If there was any doubt, going to the TMO would have taken doubt away. But it's something we could have controlled from the line-out. It's the toughest defeat I've ever had to take.
"We've talked about moving the team forward, and I think we've done that."
'If anyone can understand it's the Welsh!'
Wales captain Sam Warburton offers some words of support, after Wales suffered similar heartache yesterday losing 23-19 to South Africa.
Australia 35-34 Scotland
It is worth remembering that Drew Mitchell is only able to score his two tries today after the Australian Rugby Union - under a bit of pressure from Michael Chieka - relaxed their ban on overseas-based players.
That paved the way for Mitchell and Matt Giteau's return to the side and their experience came to the fore in that nip-and-tuck quarter-final.
It is one thing for the All Blacks to only pick domestic-based players, but can the northern hemisphere sides continue their embargo?
It's not gone well at this World Cup.
Australia 35-34 Scotland
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Australia wing Drew Mitchell: "I guess there's relief but also pride. We stuck in there and gave ourselves a chance to see it out. I feel for Scotland, it's a tough way to go out.
"There's a tremendous amount of belief in this squad. There were five minutes to go, and we knew if we could get up the other end, we'd have a chance.
On whether Australia's penalty should have been awarded: "Oh mate, that's for the referee to determine. It was about Bernard keeping his nerve to stick it over."
Australia 35-34 Scotland
Gavin Hastings
Former Scotland full-back on BBC Radio 5 live
"I've just about calmed down. You just feel so sad. Scotland worked so hard. Every time you thought the game was getting away from them, they found a way back. It's a tragedy for Scotland. It's a bit of a tragedy for rugby."
Australia 35-34 Scotland
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Referee Craig Joubert's call on Sean Maitland's yellow card earlier in the second half was as difficult to understand as the final penalty.
He ruled that Maitland's knock-on was deliberate.And that was with the help of the TMO.
Their decision seems to discount any possibility of a player every catching a ball with one hand.
Had that ball stuck to the Scotland wing's palm, he had a decent chance of an interception try.
That surely was in his mind, rather than a cynical slap-down.
Australia 35-34 Scotland
Matt Dawson
2003 World Cup winner on BBC Radio 5 live
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"I just get frustrated when games are decided by such decisions. I wish Vern Cotter could come out and say I'm angry. I also want some accountability. I want a quote from Craig Joubert or from World Rugby to explain themselves.
"The whole tournament has been incredible. I was hugging Gavin Hastings when Scotland scored a try. If that isn't an incredible moment, I don't know what is. There's no reason why the two semi-finals won't be great."
Be Proud
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Current and former players applaud the brave Scottish players.
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Australia 35-34 Scotland
Gavin Hastings
Former Scotland full-back on BBC Radio 5 live
"If I see referee Craig Joubert again, I am going to tell him how disgusted I am. It was disgraceful that he ran straight off the pitch at the end like that.
"The referee is not expected to make the right decision all the time. That's what the TMO system is in place for. This is the quarter-final of a Rugby World Cup. This is the highest end of our sport and they have to get these decisions right."
Gutted!
Current and former rugby players show their disappointment at Scotland's last minute defeat.
Australia 35-34 Scotland
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Australia coach Michael Cheika: "I think we were a little flat in the first half. But we got more line speed in the second half."
Asked if Australia should have been awarded their late penalty: "It's a penalty and that's the way it works. You've still got to kick it."
Australia 35-34 Scotland
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Greig Laidlaw tells ITV Sport that the referee should have gone upstairs to review the final penalty decision.
And, by golly, he should have.
It looks clearly like Nick Phipps - the Australia scrum-half- got the final touch on the ball before offside Scotland prop Jon Welsh instinctively grabbed it.
That should have been an accidental offside and a scrum-down Australia.
You couldn't write it...
Australia 35-34 Scotland
Scotland coach Vern Cotter: "It was a brave effort from our players. The guys played well with good heart and character. They put on a good performances.
"They didn't let go. They kept believing. They've take that with them."
Asked if Australia's final penalty should have gone to the TMO: "It might have been nice."
Australia 35-34 Scotland
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It is difficult to pick out the positives out of what must be a morgue of dressing room, but that performance was a vindication of Vern Cotter's ambitious and adventurous philosophy.
Scotland finished bottom of the Six Nations this year. They are a whole lot better than that. There is a very good team in there.
If his Clermont team are the template, he is worth sticking with.
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Australia 35-34 Scotland
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Sport can be so brutally cruel.
Victory written off before kick-off, grasped with five minutes to go and then whipped away with two left.
The Scots look utterly empty. An emotional gut-punch on top of 80 minutes of Herculean effort.
Full-time
Australia 35-34 Scotland
Penalty - Foley
Australia 35-34 Scotland
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Bernard Foley lands it. And Scotland have to hope for a fumble off the kick-off...
Australia 32-34 Scotland
Scotland offside! Agony!
Referee Craig Joubert awards the penalty Australia's way.
This is kickable. But Bernard Foley's nerves have been less than rock-solid.
Here we go...
Oh the drama
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Australia 32-34 Scotland
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Free-kick Scotland as the scrum slips and slides and referee Criag Joubert finds in their favour.
Finn Russell booms up into the Aussie half.
Australia 32-34 Scotland
Scotland fluff the restart collect, but then the Aussies knock on as they recover.
Suddenly this teeming rain is working in the Scot's favour.
Four minutes. Just four little minutes.
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Australia 32-34 Scotland
Matt Dawson
2003 World Cup winner on BBC Radio 5 live
"I'm going to say it. Come on Scotland! Come on!"
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Australia 32-34 Scotland
Gavin Hastings
Former Scotland full-back on BBC Radio 5 live
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"Oh, you cannot write a script like this! This is what sport at the highest level is all about. A brilliant kick from Greig Laidlaw. Kurtley Beale gathered it well. But goodness me, Mark Bennett, has he every scored a more important try in his life?"
Converted try - Bennett
Australia 32-34 Scotland
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And he is under the sticks!
James Slipper - the replacement prop - throws a horror show of a pass. Loopy, slow and readable as a JK Rowling classic.
Mark Bennett pounces and scampers in. Greig Laidlaw plugs over the extras and Scotland are ahead!
Twickenham ringing.
Australia 32-27 Scotland
Matt Dawson
2003 World Cup winner on BBC Radio 5 live
ReutersCopyright: Reuters
"In the next five minutes, I want to see some leadership from Scotland. They need to say: 'We're going to get into the Australia 22 and squeeze them.'"
Australia 32-27 Scotland
The rain is hammering down now.
Normally, that would play into Scottish hands. But they cannot shove it up the jumper now, they have to spin and move and this is not the weather for it.
Australia 32-27 Scotland
Australia still in control and they edge all the attacking stats
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Australia 32-27 Scotland
Paul Grayson
Former England fly-half on BBC Radio 5 live
"It's not good news for Scotland as they chase the try they need. The rain's just started. It's going to make the ball slippy."
Australia 32-27 Scotland
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Stuart Hogg spots that Australia's back three have left no-one back at home and attempts to find the unoccupied backwaters of the Aussie half.
Over-cooked and out on the full. Play is pulled back and the Scotland full-back grimaces.
Penalty - Laidlaw
Australia 32-27 Scotland
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Over she goes.
Scotland with five points to make up and 10 minutes to do it.
And the good news is that this Wallabies defence looks a lot more porous than it did last week.
Australia 32-24 Scotland
Scotland are not going to die wondering.
Another valiant attack. They are up to within 10m. And they have a penalty to make a decision over...
Greig Laidlaw does the maths. Eight points down plus 12 minutes to go equals a kick at goal.
Should be routine.
Australia 32-24 Scotland
Another couple of switches for Scotland as Josh Strauss and Tim Swinson are brought on.
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Australia 32-24 Scotland
Gavin Hastings
Former Scotland full-back on BBC Radio 5 live
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"That was huge power and precision from Australia. Scotland went for the short line-out, the ball was was stolen from David Denton, and from then on, it was just a huge onslaught."
Converted try - Kuridrani
Australia 32-24 Scotland
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Scotland never recovered after the Wallabies nabbed line-out ball against the head.
Desperate defence, but there is a gap somewhere and Tevita Kuridrani sniffs it out, surging between John Hardie and Greig Laidlaw to make it over the final few metres.
Normal service has been fully restored from Bernard Foley. He lands another kick to take Australia eight points clear.
Australia 25-24 Scotland
Australia steal their first line-out of the day and are up to within five...
Replacement
Australia 25-24 Scotland
What a final last 20 minutes we have in store here.
Wing Tommy Seymour makes way for Scotland replaced by Sean Lamont.
Historic
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Australia 25-24 Scotland
Gavin Hastings
Former Scotland full-back on BBC Radio 5 live
"You just see the Scotland bodies diving at the ankles of the Australian players. This has been an enthralling Test match. It's everything you want from knockout rugby."
Australia 25-24 Scotland
Australia are banging on the door immediately for a reply.
Adam Ashley-Cooper with a clear run to the line and 20 metres to cover, but Stuart Hogg hares across and nails his man with a superb tackle.
Try-saver from the Scotland full-back.
Australia 25-24 Scotland
Gavin Hastings
Former Scotland full-back on BBC Radio 5 live
"Finn Russell has been a terrific, talismanic figure for Scotland. His awareness to feed Tommy Seymour then was superb. This is what we want from Scotland. They are playing with huge heart and spirit. They have to keep it going."
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Try - Seymour
Australia 25-24 Scotland
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What a try!
Scotland swing the momentum behind themselves and the crowd erupt at Twickenham.
A dwadling Bernard Foley is charged down by Finn Russell who gathers and pops up the offload for Tommy Seymour to zip over with two Aussies hanging off his shirttails.
Greig Laidlaw misses his first kick of the afternoon/
Australia 25-19 Scotland
Gavin Hastings
Former Scotland full-back on BBC Radio 5 live
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"Scotland have just got to keep playing in Australia's half. The closer to 80 minutes Scotland can get and still be in this game, the more pressure they can apply."
Australia 25-19 Scotland
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Scotland turn the ball over inside their own half and, without a second of self-doubt, they spin wide.
David Denton rampages down the whitewash as Scotland play the one-man overlap well. He ships inside to Stuart Hogg who attempts an audacious pass over his shoulder.
It goes to ground. But Scotland are bristling with intent.
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Australia 25-19 Scotland
The Wallabies are enjoying a dominant spell in the game...
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Australia 25-19 Scotland
Gavin Hastings
Former Scotland full-back on BBC Radio 5 live
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"You just sense that every time Australia throw the ball along the three-quarters, they look very dangerous. Drew Mitchell looks the one player who can unlock this Scotland defence."
Australia 25-19 Scotland
Matt Dawson
2003 World Cup winner on BBC Radio 5 live
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"Will Genia has really been dictating the pace and direction of the game for Australia in this second half. But it will be interesting now that Scotland are back to a full side."
Penalty - Foley
Australia 25-19 Scotland
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A nice confidence-builder for Bernard Foley as he lands from a bit of distance, but pretty much bang in front.
Australia are tip-toeing clear. Six points now the gap, although Scotland are back to a full contingent with Sean Maitland back from the sin-bin.
Australia 22-19 Scotland
Mark Bennett is the wrong side of the breakdown and Will Genia makes the point to the referee by bulleting a pass straight at the Scotland centre's body.
Craig Joubert takes the hint and blows up for an Aussie penalty.
Australia 22-19 Scotland
Can 14-man Scotland keep Australia at bay? Sean Maitland is chomping at the bit on the sidelines - soon to be released from the sin-bin.
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Australia 22-19 Scotland
Paul Grayson
Former England fly-half on BBC Radio 5 live
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"You can get out of your own half in many ways. Scotland's backs have got to be part of the deal with their forwards here. They shouldn't be faffing about from the kick-off like that."
Australia 22-19 Scotland
Matt Dawson
2003 World Cup winner on BBC Radio 5 live
"Finn Russell and Stuart Hogg will be breathing a huge sigh of relief after they made a mess of that kick-off. Don't play around in your own 22."
Try review - Ashley-Cooper
Australia 22-19 Scotland
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After a fluffed attempt to collect Bernard Foley's kick-off from Scotland, it looks for all the world like Adam Ashley-Cooper has got in at the corner to nudge Australia eight points out of reach.
There is nothing wrong with the winger's dive into the corner, but Will Genia has fumbled forward at the base of a preceding ruck.
Play called back for a scrum to Scotland.
That is a big let-off with the Aussie power-play about three minutes from ending.
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Referee Craig Joubert has certainly got people talking on #bbcrugby
Penalty - Laidlaw
Australia 22-19 Scotland
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Scotland have still got the whip-hand at the scrum set-piece.
Scott Sio is sent backwards by WP Nel conceding the penalty and Greig Laidlaw is as reliable as death and taxes, landing off the tee and from the angle.
Australia 22-16 Scotland
Paul Grayson
Former England fly-half on BBC Radio 5 live
AFPCopyright: AFP
"I think it was Sir Clive Woodward who said that Australia aren't the brightest team. I totally disagree with that - it was brilliant of them to go where Sean Maitland's gone off in order to score that try. I can't agree with the decision to sin-bin Maitland, though. It's going to hurt Scotland unless they play really sensibly for the next 10 minutes."
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Was it a deserved yellow for Scotland's Sean Maitland?
Converted try - Mitchell
Australia 22-16 Scotland
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Very canny from the Aussies.
A line-out long is claimed by the green and gold and they look set for a shove for the line.
But they have actually opened up a sliver of short side - where there is no Sean Maitland - which they exploit with a switch of play.
Foley feeds Drew Mitchell and the Toulon man is in for the score.
Foley knocks over his first kick from four for the conversion.
Momentum swung?
Australia 22-16 Scotland
Gavin Hastings
Former Scotland full-back on BBC Radio 5 live
"In the context of this game, that sin-binning is a terrible decision. It's an instinctive reaction, when the ball is thrown between two players, to put your hand out. I don't buy that decision at all."
Sin-bin - Maitland
Australia 15-16 Scotland
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A potential game-changing decision. And it looks like the wrong one from Craig Joubert.
Bernard Foley forces an offload out of the tackle and Sean Maitland attempts to grab it with one hand. It goes forward and the ref rules deliberate knock-on and a yellow card.
It looks harsh. Very harsh.
Kick-off
Australia 15-16 Scotland
Back underway. And Blair Cowan has knocked on after Scotland claimed the kick-off.
Australia running the ball up to the Scotland 22m.
Australia 15-16 Scotland
Gavin Hastings
Former Scotland full-back on BBC Radio 5 live
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"Let's not get carried away. I've enjoyed the way Scotland have played. I talked about them taking a few chances, and that's the way it seems to have been. I've enjoyed that first half, but 40 minutes is a long time in rugby. They've got to keep working hard for each other."
Australia 15-16 Scotland
The most important team-talk of his career so far? Certainly the biggest of his Scottish reign.
Vern Cotter is delivering his final words of wisdom. Scotland have been stronger in the second half of matches so far in this tournament.
They could do with continuing that habit.
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Australia 15-16 Scotland
Vorsprung durch Scottish.
Some Teutonic-style efficiency from Vern Cotter's side who have fashioned a one-point lead out of less of the ball and territory.
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'You must believe'
Former Welsh International Scott Quinnell wants Scotland to believe.
Post update
Australia 15-16 Scotland
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Scotland number eight David Denton likes to see the ball, he has a game high 10 carries, run 36m and beaten two defenders.
Half time: Australia 15-16 Scotland
Former Australian International Lote Tuqiri is impressed with Scotland so far.
Australia 15-16 Scotland
None of Bernard Foley's conversions were easy, but none of them were very close either.
Three tries and nothing else in the Australia scoring column.
He has missed three conversions (shown in red), that is six points.
How crucial will those misses be at the end of the match?
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Thrilling at Twickenham
Australia 15-16 Scotland
Tom Fordyce
Chief sports writer at Twickenham
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Another thriller of a quarter-final, not a dud among them. Foley has left three conversions begging. Will it cost him?
Australia 15-16 Scotland
Paul Grayson
Former England fly-half on BBC Radio 5 live
"A fantastic first half. Scotland know the soft spots they want to attack, notably in the scrum - they've won a couple of penalties that way. I think the missed kicks from Bernard Foley will add to Scotland's emotional stock. There are a few points just leaking away from Australia there."
Rowling roars
Australia 15-16 Scotland
One word to sum up that last try, from the Scotland-supporting Harry Potter author...
Half-time
Australia 15-16 Scotland
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Australia 15-16 Scotland
Matt Dawson
2003 World Cup winner on BBC Radio 5 live
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"If you're going to make that decision, you have to score some points. Fair play to Australia, they had a little conference, and went for touch rather than kicking for goal."
Try - Hooper
Australia 15-16 Scotland
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The Aussie pulled the lever on the big line-out fruit machine and have come up cherries.
A clean take in the middle of the line-out, a collective shove that splinters the Scottish pack and Michael Hooper emerges from the mound of humanity to claim the pushover try.
Bernard Foley leave yet more points out there - screwing the conversion wide.
And that is the half.
Australia 10-16 Scotland
Penalty to Australia as David Denton infringes inside his own 22m line.
Now then. A brief chat among the Aussie backs. And Bernard Foley boots to the corner.
Little more than a minute on the clock.
Australia 10-16 Scotland
Scotland are growing with confidence all the time. The passes are sticking and the offloads are landing.
Stuart Hogg on a jagging break, David Denton making yards when the ball switches back across.
But Scott Sio has snufffed out this free-running festival of rugby with a smart bit of turnover work, swallowing up Greig Laidlaw and earning a penalty.
Upset on the cards?
England Rugby World Cup winner Andy Gomarsall thinks there might be an upset on the cards. Let's hope you're right Andy.
Australia 10-16 Scotland
Paul Grayson
Former England fly-half on BBC Radio 5 live
"It's guerilla warfare for Scotland. They've got to pick their battles. They've got to be harder on the edges to slow the ball down, but have to do it wisely to avoid conceding any silly penalties. Scotland were guilty of over competing at the ruck in the build-up to that last Australia try."
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Australia 10-16 Scotland
Scotland still leading but before that penalty the momentum had swung back to the men in gold.
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Penalty - Laidlaw
Australia 10-16 Scotland
APCopyright: AP
Install him at the Greenwich Observatory next to the atomic clock.
Greig Laidlaw's ever-reliable right boot sends another pearl tumbling between the sticks.
Australia 10-13 Scotland
Scott Sio is getting a working over from WP Nel at scrum-time. The Australia prop nosedives into the dirt and it is a very kickable penalty for Scotland.
Australia 10-13 Scotland
Matt Dawson
2003 World Cup winner on BBC Radio 5 live
"It was wave after wave of Australia attack. They always seem to make yardage. Scotland have got to meet them on the Australian side of the gain line. The one thing that is going to kill this Scotland side is fast ball, and at the moment, Australia have too much of it."
Try - Mitchell
Australia 10-13 Scotland
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The classic one-two punch.
Big beefy runners - Scott Sio and Kane Douglas particularly destructive - sucked in the defence close to the breakdown, before Australia slung the ball into the open spaces out wide for the speedsters.
Drew Mitchell crosses in the corner as isolated as a man on a prairie.
Foley, yet to locate his kicking boots, muffs a tricky conversion attempt.
Australia 5-13 Scotland
Kane Douglas pumps the thighs. Sekope Kefu carries on. Australia to within five metres.
Australia 5-13 Scotland
Peter Horne has a little nibble too many at the breakdown in midfield.
That is costly. Bernard Foley has kicked the penalty into the Scotland 22m and the Wallabies have a line-out and the Scots where they want them.
Australia 5-13 Scotland
Gavin Hastings
Former Scotland full-back on BBC Radio 5 live
AFPCopyright: AFP
"The defence has been absolutely ferocious from Scotland. The big question is: Can they hang on? But at the moment, they are doing, very, very well indeed."
Australia 5-13 Scotland
Tevita Kuridrani pops an offload straight into the hands of Scotland's Finn Russell. Interception!
Where is the gap? Scotland never get to fully probe the Australia defence as Russell's pass to Tommy Seymour squirms out of the wing's grasp.
Australia 5-13 Scotland
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Scotland lock Richie Gray did not miss a tackle in the pool stages with 45 from 45.
He has missed his first tackle today, but still made five successful ones.
Australia 5-13 Scotland
Gavin Hastings
Former Scotland full-back on BBC Radio 5 live
AFPCopyright: AFP
"I'm really pleased with the way Scotland have attacked the Australia defence. They are looking around and wondering what Scotland are going to do next, because they are not doing anything predictable. David Denton has been outstanding, and the Gray brothers are very much to the fore too."
Australia 5-13 Scotland
Finn Russell is picking on Bernard Foley like a child with a week-old scab.
The Scotland fly-half hoists another sky-scraping bomb toward Foley who is stationed out the wing.
Kurtley Beale gets across to take the ball and help out his man, but Scotland will keep plugging away at that weakness.
The hopes of a hemisphere
Former Scotland International Andy Nicol tweets his support.
Australia 5-13 Scotland
What a difference five minutes makes.
After Greig Laidlaw gets them on the board with three points after 14 minutes, the Scots suddenly had a spring in their step and they have reversed the early pressure from Australia.
The Wallabies were forced to make 33 tackles while Scotland attacked and the Scots now have more metres and carries than the Wallabies.
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Australia 5-13 Scotland
Matt Dawson
2003 World Cup winner on BBC Radio 5 live
AFPCopyright: AFP
"Scotland are attacking where Australia are weak, which is right through the middle. There are some really nice decisions being made through the phases, rather than just doing what they've been doing on the training field - as a lot of the northern hemisphere sides have been."
Penalty - Laidlaw
Australia 5-13 Scotland
ReutersCopyright: Reuters
WP Nel turns the screw at scrum-time and the previously bullet-proof Australia scrum is heading backwards.
Penalty decides ref Craig Joubert.
Laidlaw likes the look of it. And the Scotland fans like the look of his kick as a big boomer has the distance and direction.
Scotland more than a converted score clear.
Australia 5-10 Scotland
Australia are rattled.
And Bernard Foley is definitely ruffled.
The Aussie fly-half drops a straightforward hoof and Greig Laidlaw is straight in his ear, feeding his inner demons as the scrum is awarded Scotland's way.
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Australia 5-10 Scotland
Gavin Hastings
Former Scotland full-back on BBC Radio 5 live
AFPCopyright: AFP
"Peter Horne came from right in the middle of that ruck. The Australians just stood and watched. It's great to see how Scotland have come back. They were galvanised by Australia's try."
Converted try - Horne
Australia 5-10 Scotland
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Well, well,well.
Scotland truck up with intent. Big carries from WP Nel and David Denton to take them up to within five metres.
And then the Aussie defence falls asleep.
The man on guard duty around the ruck allows Peter Horne to pick, go and stroll under the sticks.
Conversion is routine for Laidlaw.
Australia 5-3 Scotland
Tommy Seymour gets his wings, soaring above Bernard Foley to claim Finn Russell's kick. Electricity around the Twickenham stands. Is there something stirring?
The Scottish momentum dissipates as a kick bobbles long into the Aussie in-goal.
Drop-out 22m.
Australia 5-3 Scotland
Gavin Hastings
Former Scotland full-back on BBC Radio 5 live
"That is so cynical from Australia, with the way they're slowing the ball down. There's no way that isn't a yellow card. That's the wrong decision there. What's made the difference for Scotland in the last few minutes is that they have managed to get this quick ball."
Penalty - Laidlaw
Australia 5-3 Scotland
Greig Laidlaw strokes the ball off the tee beautifully. A tight angle, but he makes light of it. Through the middle and the Scots back to within two points.
Australia 5-0 Scotland
Scott Fardy is off his feet as he attempts to wrestle the ball away from the tackled Stuart Hogg.
He protests his innocence. But that is clear-cut. Penalty Scotland and Greig Laidlaw points goalwards.
Australia 5-0 Scotland
One-way traffic at Twickenham.
If 81% possession doesn't give you an indication of how dominant Australia have been in the opening 10 minutes then how about:
Australia have made 39 passes, Scotland just five.
And in defence Scotland have made 35 tackles, but just five made by Australia.
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Australia 5-0 Scotland
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Scotland now on the rumble. David Denton and Richie Gray making big inroads. And the Aussie tryline is 10 metres away.
This Aussie defence is getting its first examination.
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Australia 5-0 Scotland
Gavin Hastings
Former Scotland full-back on BBC Radio 5 live
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"It's no more than Australia deserve. Tommy Seymour came in off the wing and committed to Tuvita Kuridrani - but missed him. The pass took out Stuart Hogg to allow Adam Ashley-Cooper to run in."
Try - Ashley-Cooper
Australia 5-0 Scotland
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If you back yourself to come out of the defensive line to make a big hit, you have to stick your man on their deck.
Tommy Seymour's eyes light up as the ball is flung out to Tevita Kuridrani in the Aussie midfield, but the Scotland wing is given the big brush off and Kuridrani scampers into the hole he has left.
He draws last man Stuart Hogg and feeds Adam Ashley-Cooper into the corner.
Foley missed the conversion, hooking left.
Australia 0-0 Scotland
Gavin Hastings
Former Scotland full-back on BBC Radio 5 live
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"This has been one-way traffic. Foley has been at the heart of everything. That was a chance that went begging there."
Australia 0-0 Scotland
Vern Cotter said before kick-off that Scotland were going to be unpredictable. Finn Russell duly throws a pass wide to Sean Maitland in the shadow of their own posts.
The wing hacks on. But I think the orthodox would have worked better there.
Australia 0-0 Scotland
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Dreamy show and go from Bernard Foley and he wiggles though a glimmer of a gap. Surely he is over?
He opts to offload to the supporting Drew Mitchell just to make sure. Big mistake.
The ball goes to ground. Foley would have been over had he hung on and stretched for the line.
Scrum five Scotland. And a let-off.
Australia 0-0 Scotland
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Australia are rumbling up to within five metres. Stephen Moore burrowing through a small hole around the fringes.
Australia 0-0 Scotland
Matt Dawson
2003 World Cup winner on BBC Radio 5 live
"I think Scotland do need to throw caution to the wind, but it's got to be at the right times. Don't put yourself under undue pressure. Running up blind alleys against Australia is only going to cause you problems. So let's see expansive rugby from Scotland, but only at the right times."
Australia 0-0 Scotland
Richie Gray seizes on the loose ball as Australia prop Scott Sio stubs it out of the side of a ruck with his big toe.
Sean Maitland likes the look of the open field and has a dart. Big hit comes in from Sio and the ball spills forward.
Scotland used their advantage. Scrum down gold.
Australia 0-0 Scotland
A bit of a bone-headed penalty given away by Scotland.
It was Alasdair Dickinson who ran around the wrong side of the ruck and tangled with Will Genia to give away the first penalty.
Kick-off
Australia 0-0 Scotland
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Craig Joubert is on whistle duty. Finn Russell bangs a high, hanging drop-out and flanker Scott Fardy claims for the Wallabies.
Australia v Scotland (16:00 BST)
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Princess Anne adds her voice to the slow, proud menace of Flower of Scotland.
Australia bounce into the perkier Advance Australia Fair full of the confidence that coming through Pool A with a 100% record will give you.
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Teams out
Australia v Scotland (16:00 BST)
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Some big strings and burst of pyro to welcome the two sides to the Twickenham pitch.
The atmopshere is not the lid-on Cardiff cauldrom, more ancient amphitheatre.
Anthem time.
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'It's going to the wire'
Australia v Scotland (16:00 BST)
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Australia coach Michael Cheika, speaking to ITV Sport: "It's essential we improve from the Wales match and go to another level today. This is going down to the wire, this match."
Australia v Scotland (16:00 BST)
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Scotland coach Vern Cotter seems to unplug 80% of his brain for the pre-match media chit-chat. Very sensible.
Speaking of Fraser Brown and Tim Swinson's relegation to the bench: "These guys are proud competitors, but they understand what is best for the team. There are no egos.
"It is just a matter of getting hold of the ball and varying our game to keep us unpredictable."
Monotone and motionless through out his ITV interview.
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Ouch.... (The Wooden Spoon traditionally goes to the bottom team in the Six Nations, in case you're wondering...)
Hoping for some Scottish magic...
And in case you were wondering what Harry Potter author JK was replying too...
'Pocock a big loss'
Australia v Scotland (16:00 BST)
Matt Dawson
2003 World Cup winner on BBC Radio 5 live
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"Losing David Pocock is significant for Australia. He and Michael Hooper are such a good combination. When Hooper makes a tackle, Pocock steals it. When Pocock makes a tackle, Hooper steals it. They win so many turnovers that way."
'Take a few risks, Scotland'
Australia v Scotland (16:00 BST)
Gavin Hastings
Former Scotland full-back on BBC Radio 5 live
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"I just hope that Scotland really take a few risks and believe they can cause Australia some problems. They've scored some fantastic tries during this World Cup, and I hope they can score a few more."
Beale to shine?
Australia v Scotland (16:00 BST)
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Israel Folau's injury allows Kurtley Beale to come into the Australia starting XV.
The 26-year-old has had his off-the-field issues, but there is one heck of a player in there - an electric runner, an almost extra-sensory feeling for space and a supercomputer of a rugby brain.
He was a much-heralded talent as a schoolboy, referred to as "Mozart in cleats" by one national newspaper.
You can see why in this highlights package from his school days.
'Scots sole ray of sunshine'
Tom Fordyce
Chief sports writer at Twickenham
"Clouding over at Twickenham, and Scotland left as the northern hemisphere's sole ray of sunshine in this World Cup. Even the kilted in the towering stands are hopeful rather than expectant against this hugely impressive Wallabies' team, but with Harry Potter author JK Rowling here to cheer her nation on, might there just be a little magic in the air?"
Australia lead the head-to-head
Australia v Scotland (16:00 BST)
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This will be the second World Cup meeting between these sides having met at the same stage in 2003, a game which Australia won 33-16 and in which today's centurion Matt Giteau featured as a replacement fly-half.
Australia have won 17 of their last 19 Test matches against Scotland, however those two defeats have come in their last three meetings (2012 and 2009).
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For our younger readers, Callum has updated Ally's Tartan Army - the official Scotland World Cup song of 1978.
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The northern hemisphere has always had at least one representative in the semi-finals in each of the previous seven World Cups.
When France made the 1999 semi-finals was the only time no home nation made the last four.
But every other staging has seen two northern hemisphere sides make the last four.
Scotland at sixes and sevens?
Australia v Scotland (16:00 BST)
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Scotland have gone for two breakdown bloodhounds with Blair Cowan at six and John Hardie at seven.
Can they keep the possession supply lines open for their dangerous backline runners?
England's flanker-in-exile Steffon Armitage wishes his Aussie Toulon team mates Matt Giteau and Drew Mitchell luck ahead of today's match.
Bodies in the furnace, brains in the fridge
Scotland v Australia (16:00 BST)
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Last weekend against Wales saw Australia mount one of the finest defensive efforts of any World Cup.
With Will Genia and Dean Mumm both in the bin, the Wallabies held out against wave after wave of Welsh attacks.
Warren Gatland's side did everything short of loading Jamie Roberts into a catapult and slinging him at the yellow wall and still could not find a way through.
With the three confirmed semi-finalists all from the Southern Hemisphere, Matt Dawson poses the question we're probably all asking ourselves.
Post update
Australia v Scotland (16:00 BST)
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Former England captain Lawrence Dallaglio has just suggested on ITV Sport that the difference that the southern hemisphere sides have over their northern rivals is an markedly superior ability to "pass and catch the ball".
Is it that simple? Have teams in the north got so caught up in pumping iron, popping supplements and learning complex defensive systems that they have forgotten the simple joy of playing off-the-cuff rugby?
That might be a big part of it.
Team news
Australia v Scotland (16:00 BST)
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Key Australian duo David Pocock and Israel Folau have failed to overcome injuries in time to face Scotland in Sunday's World Cup quarter-final.
Ben McCalman and Kurtley Beale replace the duo at number eight and full-back respectively.
Flanker Michael Hooper returns from a one-week suspension incurred for a dangerous clear-out.
Scotland are the last European side left standing and the last-eight score so far stands at southern hemisphere 3-0 Northern hemisphere.
Judging by the Pool stages, the gap between Tier One and Tier Two nation may have been narrowing.
Judging by the knock-out stages so far, the class divide between the northern hemisphere and the southern hemisphere may be creaking wider.
Fair? If so, what are the Rugby Championship nations doing different and how can our friends in the north catch up?
Your remedies of Europe's woes to #bbcrugby on Twitter and 81111 on text from UK phones.
BBC Coverage
BBC Radio 5 live coverage underway
Simply click on the coverage tab at the top of this page, to enjoy all the pre-match build-up.
Ford and J Gray start for Scotland
Australia v Scotland (16:00 BST)
The bookmakers will be tweaking the numbers on offer for Scotland in the past hour.
After hooker Ross Ford and second row Jonny Gray successfully appealed on Saturday against the three-week bans picked up for an over-eager clear-out against Samoa, both were available to be slipped into the Scotland team at late notice.
Coach Vern Cotter has pulled the ripcord. Fraser Brown and Tim Swinson drop to the bench.
Live Reporting
Mike Henson
All times stated are UK
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- Australia have made 39 passes, Scotland just five.
- And in defence Scotland have made 35 tackles, but just five made by Australia.
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BBC SportCopyright: BBC Sport - This will be the second World Cup meeting between these sides having met at the same stage in 2003, a game which Australia won 33-16 and in which today's centurion Matt Giteau featured as a replacement fly-half.
- Australia have won 17 of their last 19 Test matches against Scotland, however those two defeats have come in their last three meetings (2012 and 2009).
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Latest PostAustralia 35-34 Scotland
The Aussie media have decided that today's close shave shows that their team's hope of lifting a third World Cup are toast unless they get David Pocock back in the XV sharpish.
"The fate of the Wallabies' World Cup chances now rest on the condition of David Pocock's calf," say the Sydney Morning Herald.
They go on. For Scotland. and the rest of the northern hemisphere contenders, the tournament ends here.
Still two mouth-watering semi-finals to look forward to.
See you there.
Beale tops Aussie stats
Has Kurtley Beale done enough to keep the full-back spot that he borrowed from an injured Israel Folau this afternoon?
Folau has been short of his best in the tournament so far and Beale made more metres (54) and carries (14) than any other Australian.
Did the referee get it wrong?
LOTS of current and former players think so.
Denton prominent
Australia 35-34 Scotland
David Denton had a massive game in the loose for Scotland.
The number eight made 58 metres, 15 carries, two clean breaks and beat three defenders - all team-high totals.
Heartbreaking
Brian O'Driscoll sums up the heartache for Scotland.
Australia 35-34 Scotland
Scotland prop Alasdair Dickinson, speaking to BBC Sport: "I don't know what to say. It was a heartbreaking game. I honestly thought we had it until the last minute.
"We've not really discussed the referee's decision. It's still very raw. The decision's made and we have to live with it. We're gutted.
"We've laid a platform for the future. Everybody was writing us off for this game, and we felt we could win it. We probably should have edged it today. but it's a fine line in rugby."
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Australia 35-34 Scotland
John Beattie
Former Scotland international on BBC Radio 5 live
"I think World Rugby have to tell us why the referee ran off the pitch. Was he being threatened by Scotland players? I don't think so. Was a bottle thrown at him? Well, that's one idiot in the crowd. If he ran off because he got the decision wrong, then that is a disgrace.
"We lost the game, but the referee was a numpty. When you're Scotland, it feels as if we're the little nation, and the big guys get the decisions. But I might be wrong."
Australia 35-34 Scotland
Australia fly-half Bernard Foley, telling BBC Sport about his thoughts before kicking the winning points: "I think I was telling the team I owed them one after giving them the charge down earlier. I don't know if I've got ice-cool nerves. I'd rather not be kicking them right at the death.
"There is a lot of character in this side. Even when we were behind with five minutes to go, we knew we had a chance. But credit goes to Scotland.
"I haven't seen the replay of the penalty incident. I just take it on the ref's call."
Semi-final line-up
After 44 matches, we have our final four and not a single northern hemisphere team in sight.
To think they shortened the Rugby Championship to make calendar space for this World Cup.
They could have played another round and handed out the Webb Ellis trophy there and then.
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Australia 35-34 Scotland
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Australia 35-34 Scotland
Scotland fly-half Greig Laidlaw, speaking to BBC Sport: "I don't know what to say. It's hard to take in that manner, to lose it at the death. We're gutted to lose and to lose in that manner.
"If there was any doubt, going to the TMO would have taken doubt away. But it's something we could have controlled from the line-out. It's the toughest defeat I've ever had to take.
"We've talked about moving the team forward, and I think we've done that."
'If anyone can understand it's the Welsh!'
Wales captain Sam Warburton offers some words of support, after Wales suffered similar heartache yesterday losing 23-19 to South Africa.
Australia 35-34 Scotland
It is worth remembering that Drew Mitchell is only able to score his two tries today after the Australian Rugby Union - under a bit of pressure from Michael Chieka - relaxed their ban on overseas-based players.
That paved the way for Mitchell and Matt Giteau's return to the side and their experience came to the fore in that nip-and-tuck quarter-final.
It is one thing for the All Blacks to only pick domestic-based players, but can the northern hemisphere sides continue their embargo?
It's not gone well at this World Cup.
Australia 35-34 Scotland
Australia wing Drew Mitchell: "I guess there's relief but also pride. We stuck in there and gave ourselves a chance to see it out. I feel for Scotland, it's a tough way to go out.
"There's a tremendous amount of belief in this squad. There were five minutes to go, and we knew if we could get up the other end, we'd have a chance.
On whether Australia's penalty should have been awarded: "Oh mate, that's for the referee to determine. It was about Bernard keeping his nerve to stick it over."
Australia 35-34 Scotland
Gavin Hastings
Former Scotland full-back on BBC Radio 5 live
"I've just about calmed down. You just feel so sad. Scotland worked so hard. Every time you thought the game was getting away from them, they found a way back. It's a tragedy for Scotland. It's a bit of a tragedy for rugby."
Australia 35-34 Scotland
Referee Craig Joubert's call on Sean Maitland's yellow card earlier in the second half was as difficult to understand as the final penalty.
He ruled that Maitland's knock-on was deliberate.And that was with the help of the TMO.
Their decision seems to discount any possibility of a player every catching a ball with one hand.
Had that ball stuck to the Scotland wing's palm, he had a decent chance of an interception try.
That surely was in his mind, rather than a cynical slap-down.
Australia 35-34 Scotland
Matt Dawson
2003 World Cup winner on BBC Radio 5 live
"I just get frustrated when games are decided by such decisions. I wish Vern Cotter could come out and say I'm angry. I also want some accountability. I want a quote from Craig Joubert or from World Rugby to explain themselves.
"The whole tournament has been incredible. I was hugging Gavin Hastings when Scotland scored a try. If that isn't an incredible moment, I don't know what is. There's no reason why the two semi-finals won't be great."
Be Proud
Current and former players applaud the brave Scottish players.
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Full-time
Australia 35-34 Scotland
Gavin Hastings
Former Scotland full-back on BBC Radio 5 live
"If I see referee Craig Joubert again, I am going to tell him how disgusted I am. It was disgraceful that he ran straight off the pitch at the end like that.
"The referee is not expected to make the right decision all the time. That's what the TMO system is in place for. This is the quarter-final of a Rugby World Cup. This is the highest end of our sport and they have to get these decisions right."
Gutted!
Current and former rugby players show their disappointment at Scotland's last minute defeat.
Australia 35-34 Scotland
Australia coach Michael Cheika: "I think we were a little flat in the first half. But we got more line speed in the second half."
Asked if Australia should have been awarded their late penalty: "It's a penalty and that's the way it works. You've still got to kick it."
Australia 35-34 Scotland
Greig Laidlaw tells ITV Sport that the referee should have gone upstairs to review the final penalty decision.
And, by golly, he should have.
It looks clearly like Nick Phipps - the Australia scrum-half- got the final touch on the ball before offside Scotland prop Jon Welsh instinctively grabbed it.
That should have been an accidental offside and a scrum-down Australia.
You couldn't write it...
Australia 35-34 Scotland
Scotland coach Vern Cotter: "It was a brave effort from our players. The guys played well with good heart and character. They put on a good performances.
"They didn't let go. They kept believing. They've take that with them."
Asked if Australia's final penalty should have gone to the TMO: "It might have been nice."
Australia 35-34 Scotland
It is difficult to pick out the positives out of what must be a morgue of dressing room, but that performance was a vindication of Vern Cotter's ambitious and adventurous philosophy.
Scotland finished bottom of the Six Nations this year. They are a whole lot better than that. There is a very good team in there.
If his Clermont team are the template, he is worth sticking with.
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Australia 35-34 Scotland
Sport can be so brutally cruel.
Victory written off before kick-off, grasped with five minutes to go and then whipped away with two left.
The Scots look utterly empty. An emotional gut-punch on top of 80 minutes of Herculean effort.
Full-time
Australia 35-34 Scotland
Penalty - Foley
Australia 35-34 Scotland
Bernard Foley lands it. And Scotland have to hope for a fumble off the kick-off...
Australia 32-34 Scotland
Scotland offside! Agony!
Referee Craig Joubert awards the penalty Australia's way.
This is kickable. But Bernard Foley's nerves have been less than rock-solid.
Here we go...
Oh the drama
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Australia 32-34 Scotland
Free-kick Scotland as the scrum slips and slides and referee Criag Joubert finds in their favour.
Finn Russell booms up into the Aussie half.
Australia 32-34 Scotland
Scotland fluff the restart collect, but then the Aussies knock on as they recover.
Suddenly this teeming rain is working in the Scot's favour.
Four minutes. Just four little minutes.
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Australia 32-34 Scotland
Matt Dawson
2003 World Cup winner on BBC Radio 5 live
"I'm going to say it. Come on Scotland! Come on!"
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Australia 32-34 Scotland
Gavin Hastings
Former Scotland full-back on BBC Radio 5 live
"Oh, you cannot write a script like this! This is what sport at the highest level is all about. A brilliant kick from Greig Laidlaw. Kurtley Beale gathered it well. But goodness me, Mark Bennett, has he every scored a more important try in his life?"
Converted try - Bennett
Australia 32-34 Scotland
And he is under the sticks!
James Slipper - the replacement prop - throws a horror show of a pass. Loopy, slow and readable as a JK Rowling classic.
Mark Bennett pounces and scampers in. Greig Laidlaw plugs over the extras and Scotland are ahead!
Twickenham ringing.
Australia 32-27 Scotland
Matt Dawson
2003 World Cup winner on BBC Radio 5 live
"In the next five minutes, I want to see some leadership from Scotland. They need to say: 'We're going to get into the Australia 22 and squeeze them.'"
Australia 32-27 Scotland
The rain is hammering down now.
Normally, that would play into Scottish hands. But they cannot shove it up the jumper now, they have to spin and move and this is not the weather for it.
Australia 32-27 Scotland
Australia still in control and they edge all the attacking stats
Australia 32-27 Scotland
Paul Grayson
Former England fly-half on BBC Radio 5 live
"It's not good news for Scotland as they chase the try they need. The rain's just started. It's going to make the ball slippy."
Australia 32-27 Scotland
Stuart Hogg spots that Australia's back three have left no-one back at home and attempts to find the unoccupied backwaters of the Aussie half.
Over-cooked and out on the full. Play is pulled back and the Scotland full-back grimaces.
Penalty - Laidlaw
Australia 32-27 Scotland
Over she goes.
Scotland with five points to make up and 10 minutes to do it.
And the good news is that this Wallabies defence looks a lot more porous than it did last week.
Australia 32-24 Scotland
Scotland are not going to die wondering.
Another valiant attack. They are up to within 10m. And they have a penalty to make a decision over...
Greig Laidlaw does the maths. Eight points down plus 12 minutes to go equals a kick at goal.
Should be routine.
Australia 32-24 Scotland
Another couple of switches for Scotland as Josh Strauss and Tim Swinson are brought on.
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Australia 32-24 Scotland
Gavin Hastings
Former Scotland full-back on BBC Radio 5 live
"That was huge power and precision from Australia. Scotland went for the short line-out, the ball was was stolen from David Denton, and from then on, it was just a huge onslaught."
Converted try - Kuridrani
Australia 32-24 Scotland
Scotland never recovered after the Wallabies nabbed line-out ball against the head.
Desperate defence, but there is a gap somewhere and Tevita Kuridrani sniffs it out, surging between John Hardie and Greig Laidlaw to make it over the final few metres.
Normal service has been fully restored from Bernard Foley. He lands another kick to take Australia eight points clear.
Australia 25-24 Scotland
Australia steal their first line-out of the day and are up to within five...
Replacement
Australia 25-24 Scotland
What a final last 20 minutes we have in store here.
Wing Tommy Seymour makes way for Scotland replaced by Sean Lamont.
Historic
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Australia 25-24 Scotland
Gavin Hastings
Former Scotland full-back on BBC Radio 5 live
"You just see the Scotland bodies diving at the ankles of the Australian players. This has been an enthralling Test match. It's everything you want from knockout rugby."
Australia 25-24 Scotland
Australia are banging on the door immediately for a reply.
Adam Ashley-Cooper with a clear run to the line and 20 metres to cover, but Stuart Hogg hares across and nails his man with a superb tackle.
Try-saver from the Scotland full-back.
Australia 25-24 Scotland
Gavin Hastings
Former Scotland full-back on BBC Radio 5 live
"Finn Russell has been a terrific, talismanic figure for Scotland. His awareness to feed Tommy Seymour then was superb. This is what we want from Scotland. They are playing with huge heart and spirit. They have to keep it going."
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Try - Seymour
Australia 25-24 Scotland
What a try!
Scotland swing the momentum behind themselves and the crowd erupt at Twickenham.
A dwadling Bernard Foley is charged down by Finn Russell who gathers and pops up the offload for Tommy Seymour to zip over with two Aussies hanging off his shirttails.
Greig Laidlaw misses his first kick of the afternoon/
Australia 25-19 Scotland
Gavin Hastings
Former Scotland full-back on BBC Radio 5 live
"Scotland have just got to keep playing in Australia's half. The closer to 80 minutes Scotland can get and still be in this game, the more pressure they can apply."
Australia 25-19 Scotland
Scotland turn the ball over inside their own half and, without a second of self-doubt, they spin wide.
David Denton rampages down the whitewash as Scotland play the one-man overlap well. He ships inside to Stuart Hogg who attempts an audacious pass over his shoulder.
It goes to ground. But Scotland are bristling with intent.
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Australia 25-19 Scotland
The Wallabies are enjoying a dominant spell in the game...
Australia 25-19 Scotland
Gavin Hastings
Former Scotland full-back on BBC Radio 5 live
"You just sense that every time Australia throw the ball along the three-quarters, they look very dangerous. Drew Mitchell looks the one player who can unlock this Scotland defence."
Australia 25-19 Scotland
Matt Dawson
2003 World Cup winner on BBC Radio 5 live
"Will Genia has really been dictating the pace and direction of the game for Australia in this second half. But it will be interesting now that Scotland are back to a full side."
Penalty - Foley
Australia 25-19 Scotland
A nice confidence-builder for Bernard Foley as he lands from a bit of distance, but pretty much bang in front.
Australia are tip-toeing clear. Six points now the gap, although Scotland are back to a full contingent with Sean Maitland back from the sin-bin.
Australia 22-19 Scotland
Mark Bennett is the wrong side of the breakdown and Will Genia makes the point to the referee by bulleting a pass straight at the Scotland centre's body.
Craig Joubert takes the hint and blows up for an Aussie penalty.
Australia 22-19 Scotland
Can 14-man Scotland keep Australia at bay? Sean Maitland is chomping at the bit on the sidelines - soon to be released from the sin-bin.
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Australia 22-19 Scotland
Paul Grayson
Former England fly-half on BBC Radio 5 live
"You can get out of your own half in many ways. Scotland's backs have got to be part of the deal with their forwards here. They shouldn't be faffing about from the kick-off like that."
Australia 22-19 Scotland
Matt Dawson
2003 World Cup winner on BBC Radio 5 live
"Finn Russell and Stuart Hogg will be breathing a huge sigh of relief after they made a mess of that kick-off. Don't play around in your own 22."
Try review - Ashley-Cooper
Australia 22-19 Scotland
After a fluffed attempt to collect Bernard Foley's kick-off from Scotland, it looks for all the world like Adam Ashley-Cooper has got in at the corner to nudge Australia eight points out of reach.
There is nothing wrong with the winger's dive into the corner, but Will Genia has fumbled forward at the base of a preceding ruck.
Play called back for a scrum to Scotland.
That is a big let-off with the Aussie power-play about three minutes from ending.
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Referee Craig Joubert has certainly got people talking on #bbcrugby
Penalty - Laidlaw
Australia 22-19 Scotland
Scotland have still got the whip-hand at the scrum set-piece.
Scott Sio is sent backwards by WP Nel conceding the penalty and Greig Laidlaw is as reliable as death and taxes, landing off the tee and from the angle.
Australia 22-16 Scotland
Paul Grayson
Former England fly-half on BBC Radio 5 live
"I think it was Sir Clive Woodward who said that Australia aren't the brightest team. I totally disagree with that - it was brilliant of them to go where Sean Maitland's gone off in order to score that try. I can't agree with the decision to sin-bin Maitland, though. It's going to hurt Scotland unless they play really sensibly for the next 10 minutes."
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Was it a deserved yellow for Scotland's Sean Maitland?
Converted try - Mitchell
Australia 22-16 Scotland
Very canny from the Aussies.
A line-out long is claimed by the green and gold and they look set for a shove for the line.
But they have actually opened up a sliver of short side - where there is no Sean Maitland - which they exploit with a switch of play.
Foley feeds Drew Mitchell and the Toulon man is in for the score.
Foley knocks over his first kick from four for the conversion.
Momentum swung?
Australia 22-16 Scotland
Gavin Hastings
Former Scotland full-back on BBC Radio 5 live
"In the context of this game, that sin-binning is a terrible decision. It's an instinctive reaction, when the ball is thrown between two players, to put your hand out. I don't buy that decision at all."
Sin-bin - Maitland
Australia 15-16 Scotland
A potential game-changing decision. And it looks like the wrong one from Craig Joubert.
Bernard Foley forces an offload out of the tackle and Sean Maitland attempts to grab it with one hand. It goes forward and the ref rules deliberate knock-on and a yellow card.
It looks harsh. Very harsh.
Kick-off
Australia 15-16 Scotland
Back underway. And Blair Cowan has knocked on after Scotland claimed the kick-off.
Australia running the ball up to the Scotland 22m.
Australia 15-16 Scotland
Gavin Hastings
Former Scotland full-back on BBC Radio 5 live
"Let's not get carried away. I've enjoyed the way Scotland have played. I talked about them taking a few chances, and that's the way it seems to have been. I've enjoyed that first half, but 40 minutes is a long time in rugby. They've got to keep working hard for each other."
Australia 15-16 Scotland
The most important team-talk of his career so far? Certainly the biggest of his Scottish reign.
Vern Cotter is delivering his final words of wisdom. Scotland have been stronger in the second half of matches so far in this tournament.
They could do with continuing that habit.
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Australia 15-16 Scotland
Vorsprung durch Scottish.
Some Teutonic-style efficiency from Vern Cotter's side who have fashioned a one-point lead out of less of the ball and territory.
'You must believe'
Former Welsh International Scott Quinnell wants Scotland to believe.
Post update
Australia 15-16 Scotland
Scotland number eight David Denton likes to see the ball, he has a game high 10 carries, run 36m and beaten two defenders.
Half time: Australia 15-16 Scotland
Former Australian International Lote Tuqiri is impressed with Scotland so far.
Australia 15-16 Scotland
None of Bernard Foley's conversions were easy, but none of them were very close either.
Three tries and nothing else in the Australia scoring column.
He has missed three conversions (shown in red), that is six points.
How crucial will those misses be at the end of the match?
Thrilling at Twickenham
Australia 15-16 Scotland
Tom Fordyce
Chief sports writer at Twickenham
Another thriller of a quarter-final, not a dud among them. Foley has left three conversions begging. Will it cost him?
Australia 15-16 Scotland
Paul Grayson
Former England fly-half on BBC Radio 5 live
"A fantastic first half. Scotland know the soft spots they want to attack, notably in the scrum - they've won a couple of penalties that way. I think the missed kicks from Bernard Foley will add to Scotland's emotional stock. There are a few points just leaking away from Australia there."
Rowling roars
Australia 15-16 Scotland
One word to sum up that last try, from the Scotland-supporting Harry Potter author...
Half-time
Australia 15-16 Scotland
Australia 15-16 Scotland
Matt Dawson
2003 World Cup winner on BBC Radio 5 live
"If you're going to make that decision, you have to score some points. Fair play to Australia, they had a little conference, and went for touch rather than kicking for goal."
Try - Hooper
Australia 15-16 Scotland
The Aussie pulled the lever on the big line-out fruit machine and have come up cherries.
A clean take in the middle of the line-out, a collective shove that splinters the Scottish pack and Michael Hooper emerges from the mound of humanity to claim the pushover try.
Bernard Foley leave yet more points out there - screwing the conversion wide.
And that is the half.
Australia 10-16 Scotland
Penalty to Australia as David Denton infringes inside his own 22m line.
Now then. A brief chat among the Aussie backs. And Bernard Foley boots to the corner.
Little more than a minute on the clock.
Australia 10-16 Scotland
Scotland are growing with confidence all the time. The passes are sticking and the offloads are landing.
Stuart Hogg on a jagging break, David Denton making yards when the ball switches back across.
But Scott Sio has snufffed out this free-running festival of rugby with a smart bit of turnover work, swallowing up Greig Laidlaw and earning a penalty.
Upset on the cards?
England Rugby World Cup winner Andy Gomarsall thinks there might be an upset on the cards. Let's hope you're right Andy.
Australia 10-16 Scotland
Paul Grayson
Former England fly-half on BBC Radio 5 live
"It's guerilla warfare for Scotland. They've got to pick their battles. They've got to be harder on the edges to slow the ball down, but have to do it wisely to avoid conceding any silly penalties. Scotland were guilty of over competing at the ruck in the build-up to that last Australia try."
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Australia 10-16 Scotland
Scotland still leading but before that penalty the momentum had swung back to the men in gold.
Penalty - Laidlaw
Australia 10-16 Scotland
Install him at the Greenwich Observatory next to the atomic clock.
Greig Laidlaw's ever-reliable right boot sends another pearl tumbling between the sticks.
Australia 10-13 Scotland
Scott Sio is getting a working over from WP Nel at scrum-time. The Australia prop nosedives into the dirt and it is a very kickable penalty for Scotland.
Australia 10-13 Scotland
Matt Dawson
2003 World Cup winner on BBC Radio 5 live
"It was wave after wave of Australia attack. They always seem to make yardage. Scotland have got to meet them on the Australian side of the gain line. The one thing that is going to kill this Scotland side is fast ball, and at the moment, Australia have too much of it."
Try - Mitchell
Australia 10-13 Scotland
The classic one-two punch.
Big beefy runners - Scott Sio and Kane Douglas particularly destructive - sucked in the defence close to the breakdown, before Australia slung the ball into the open spaces out wide for the speedsters.
Drew Mitchell crosses in the corner as isolated as a man on a prairie.
Foley, yet to locate his kicking boots, muffs a tricky conversion attempt.
Australia 5-13 Scotland
Kane Douglas pumps the thighs. Sekope Kefu carries on. Australia to within five metres.
Australia 5-13 Scotland
Peter Horne has a little nibble too many at the breakdown in midfield.
That is costly. Bernard Foley has kicked the penalty into the Scotland 22m and the Wallabies have a line-out and the Scots where they want them.
Australia 5-13 Scotland
Gavin Hastings
Former Scotland full-back on BBC Radio 5 live
"The defence has been absolutely ferocious from Scotland. The big question is: Can they hang on? But at the moment, they are doing, very, very well indeed."
Australia 5-13 Scotland
Tevita Kuridrani pops an offload straight into the hands of Scotland's Finn Russell. Interception!
Where is the gap? Scotland never get to fully probe the Australia defence as Russell's pass to Tommy Seymour squirms out of the wing's grasp.
Australia 5-13 Scotland
Scotland lock Richie Gray did not miss a tackle in the pool stages with 45 from 45.
He has missed his first tackle today, but still made five successful ones.
Australia 5-13 Scotland
Gavin Hastings
Former Scotland full-back on BBC Radio 5 live
"I'm really pleased with the way Scotland have attacked the Australia defence. They are looking around and wondering what Scotland are going to do next, because they are not doing anything predictable. David Denton has been outstanding, and the Gray brothers are very much to the fore too."
Australia 5-13 Scotland
Finn Russell is picking on Bernard Foley like a child with a week-old scab.
The Scotland fly-half hoists another sky-scraping bomb toward Foley who is stationed out the wing.
Kurtley Beale gets across to take the ball and help out his man, but Scotland will keep plugging away at that weakness.
The hopes of a hemisphere
Former Scotland International Andy Nicol tweets his support.
Australia 5-13 Scotland
What a difference five minutes makes.
After Greig Laidlaw gets them on the board with three points after 14 minutes, the Scots suddenly had a spring in their step and they have reversed the early pressure from Australia.
The Wallabies were forced to make 33 tackles while Scotland attacked and the Scots now have more metres and carries than the Wallabies.
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Australia 5-13 Scotland
Matt Dawson
2003 World Cup winner on BBC Radio 5 live
"Scotland are attacking where Australia are weak, which is right through the middle. There are some really nice decisions being made through the phases, rather than just doing what they've been doing on the training field - as a lot of the northern hemisphere sides have been."
Penalty - Laidlaw
Australia 5-13 Scotland
WP Nel turns the screw at scrum-time and the previously bullet-proof Australia scrum is heading backwards.
Penalty decides ref Craig Joubert.
Laidlaw likes the look of it. And the Scotland fans like the look of his kick as a big boomer has the distance and direction.
Scotland more than a converted score clear.
Australia 5-10 Scotland
Australia are rattled.
And Bernard Foley is definitely ruffled.
The Aussie fly-half drops a straightforward hoof and Greig Laidlaw is straight in his ear, feeding his inner demons as the scrum is awarded Scotland's way.
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Australia 5-10 Scotland
Gavin Hastings
Former Scotland full-back on BBC Radio 5 live
"Peter Horne came from right in the middle of that ruck. The Australians just stood and watched. It's great to see how Scotland have come back. They were galvanised by Australia's try."
Converted try - Horne
Australia 5-10 Scotland
Well, well,well.
Scotland truck up with intent. Big carries from WP Nel and David Denton to take them up to within five metres.
And then the Aussie defence falls asleep.
The man on guard duty around the ruck allows Peter Horne to pick, go and stroll under the sticks.
Conversion is routine for Laidlaw.
Australia 5-3 Scotland
Tommy Seymour gets his wings, soaring above Bernard Foley to claim Finn Russell's kick. Electricity around the Twickenham stands. Is there something stirring?
The Scottish momentum dissipates as a kick bobbles long into the Aussie in-goal.
Drop-out 22m.
Australia 5-3 Scotland
Gavin Hastings
Former Scotland full-back on BBC Radio 5 live
"That is so cynical from Australia, with the way they're slowing the ball down. There's no way that isn't a yellow card. That's the wrong decision there. What's made the difference for Scotland in the last few minutes is that they have managed to get this quick ball."
Penalty - Laidlaw
Australia 5-3 Scotland
Greig Laidlaw strokes the ball off the tee beautifully. A tight angle, but he makes light of it. Through the middle and the Scots back to within two points.
Australia 5-0 Scotland
Scott Fardy is off his feet as he attempts to wrestle the ball away from the tackled Stuart Hogg.
He protests his innocence. But that is clear-cut. Penalty Scotland and Greig Laidlaw points goalwards.
Australia 5-0 Scotland
One-way traffic at Twickenham.
If 81% possession doesn't give you an indication of how dominant Australia have been in the opening 10 minutes then how about:
Australia 5-0 Scotland
Scotland now on the rumble. David Denton and Richie Gray making big inroads. And the Aussie tryline is 10 metres away.
This Aussie defence is getting its first examination.
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Australia 5-0 Scotland
Gavin Hastings
Former Scotland full-back on BBC Radio 5 live
"It's no more than Australia deserve. Tommy Seymour came in off the wing and committed to Tuvita Kuridrani - but missed him. The pass took out Stuart Hogg to allow Adam Ashley-Cooper to run in."
Try - Ashley-Cooper
Australia 5-0 Scotland
If you back yourself to come out of the defensive line to make a big hit, you have to stick your man on their deck.
Tommy Seymour's eyes light up as the ball is flung out to Tevita Kuridrani in the Aussie midfield, but the Scotland wing is given the big brush off and Kuridrani scampers into the hole he has left.
He draws last man Stuart Hogg and feeds Adam Ashley-Cooper into the corner.
Foley missed the conversion, hooking left.
Australia 0-0 Scotland
Gavin Hastings
Former Scotland full-back on BBC Radio 5 live
"This has been one-way traffic. Foley has been at the heart of everything. That was a chance that went begging there."
Australia 0-0 Scotland
Vern Cotter said before kick-off that Scotland were going to be unpredictable. Finn Russell duly throws a pass wide to Sean Maitland in the shadow of their own posts.
The wing hacks on. But I think the orthodox would have worked better there.
Australia 0-0 Scotland
Dreamy show and go from Bernard Foley and he wiggles though a glimmer of a gap. Surely he is over?
He opts to offload to the supporting Drew Mitchell just to make sure. Big mistake.
The ball goes to ground. Foley would have been over had he hung on and stretched for the line.
Scrum five Scotland. And a let-off.
Australia 0-0 Scotland
Australia are rumbling up to within five metres. Stephen Moore burrowing through a small hole around the fringes.
Australia 0-0 Scotland
Matt Dawson
2003 World Cup winner on BBC Radio 5 live
"I think Scotland do need to throw caution to the wind, but it's got to be at the right times. Don't put yourself under undue pressure. Running up blind alleys against Australia is only going to cause you problems. So let's see expansive rugby from Scotland, but only at the right times."
Australia 0-0 Scotland
Richie Gray seizes on the loose ball as Australia prop Scott Sio stubs it out of the side of a ruck with his big toe.
Sean Maitland likes the look of the open field and has a dart. Big hit comes in from Sio and the ball spills forward.
Scotland used their advantage. Scrum down gold.
Australia 0-0 Scotland
A bit of a bone-headed penalty given away by Scotland.
It was Alasdair Dickinson who ran around the wrong side of the ruck and tangled with Will Genia to give away the first penalty.
Kick-off
Australia 0-0 Scotland
Craig Joubert is on whistle duty. Finn Russell bangs a high, hanging drop-out and flanker Scott Fardy claims for the Wallabies.
Australia v Scotland (16:00 BST)
Princess Anne adds her voice to the slow, proud menace of Flower of Scotland.
Australia bounce into the perkier Advance Australia Fair full of the confidence that coming through Pool A with a 100% record will give you.
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Teams out
Australia v Scotland (16:00 BST)
Some big strings and burst of pyro to welcome the two sides to the Twickenham pitch.
The atmopshere is not the lid-on Cardiff cauldrom, more ancient amphitheatre.
Anthem time.
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'It's going to the wire'
Australia v Scotland (16:00 BST)
Australia coach Michael Cheika, speaking to ITV Sport: "It's essential we improve from the Wales match and go to another level today. This is going down to the wire, this match."
Australia v Scotland (16:00 BST)
Scotland coach Vern Cotter seems to unplug 80% of his brain for the pre-match media chit-chat. Very sensible.
Speaking of Fraser Brown and Tim Swinson's relegation to the bench: "These guys are proud competitors, but they understand what is best for the team. There are no egos.
"It is just a matter of getting hold of the ball and varying our game to keep us unpredictable."
Monotone and motionless through out his ITV interview.
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Ouch.... (The Wooden Spoon traditionally goes to the bottom team in the Six Nations, in case you're wondering...)
Hoping for some Scottish magic...
And in case you were wondering what Harry Potter author JK was replying too...
'Pocock a big loss'
Australia v Scotland (16:00 BST)
Matt Dawson
2003 World Cup winner on BBC Radio 5 live
"Losing David Pocock is significant for Australia. He and Michael Hooper are such a good combination. When Hooper makes a tackle, Pocock steals it. When Pocock makes a tackle, Hooper steals it. They win so many turnovers that way."
'Take a few risks, Scotland'
Australia v Scotland (16:00 BST)
Gavin Hastings
Former Scotland full-back on BBC Radio 5 live
"I just hope that Scotland really take a few risks and believe they can cause Australia some problems. They've scored some fantastic tries during this World Cup, and I hope they can score a few more."
Beale to shine?
Australia v Scotland (16:00 BST)
Israel Folau's injury allows Kurtley Beale to come into the Australia starting XV.
The 26-year-old has had his off-the-field issues, but there is one heck of a player in there - an electric runner, an almost extra-sensory feeling for space and a supercomputer of a rugby brain.
He was a much-heralded talent as a schoolboy, referred to as "Mozart in cleats" by one national newspaper.
You can see why in this highlights package from his school days.
'Scots sole ray of sunshine'
Tom Fordyce
Chief sports writer at Twickenham
"Clouding over at Twickenham, and Scotland left as the northern hemisphere's sole ray of sunshine in this World Cup. Even the kilted in the towering stands are hopeful rather than expectant against this hugely impressive Wallabies' team, but with Harry Potter author JK Rowling here to cheer her nation on, might there just be a little magic in the air?"
Australia lead the head-to-head
Australia v Scotland (16:00 BST)
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For our younger readers, Callum has updated Ally's Tartan Army - the official Scotland World Cup song of 1978.
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The northern hemisphere has always had at least one representative in the semi-finals in each of the previous seven World Cups.
When France made the 1999 semi-finals was the only time no home nation made the last four.
But every other staging has seen two northern hemisphere sides make the last four.
Scotland at sixes and sevens?
Australia v Scotland (16:00 BST)
Scotland have gone for two breakdown bloodhounds with Blair Cowan at six and John Hardie at seven.
Can they keep the possession supply lines open for their dangerous backline runners?
BBC's Tom English looks at where the game might be won and lost today, and wonderswhether the Cowan-Hardie axis might be a good idea that Vern Cotter has turned to too late.
Australia v Scotland
Kick-off 16:00 BST
England's flanker-in-exile Steffon Armitage wishes his Aussie Toulon team mates Matt Giteau and Drew Mitchell luck ahead of today's match.
Bodies in the furnace, brains in the fridge
Scotland v Australia (16:00 BST)
Last weekend against Wales saw Australia mount one of the finest defensive efforts of any World Cup.
With Will Genia and Dean Mumm both in the bin, the Wallabies held out against wave after wave of Welsh attacks.
Warren Gatland's side did everything short of loading Jamie Roberts into a catapult and slinging him at the yellow wall and still could not find a way through.
Period of play like that forges lifelong bonds between teams. And are well worth a forensic examination. BBC chief sport writer Tom Fordyce has done just that.
Southern Hemisphere dominance
With the three confirmed semi-finalists all from the Southern Hemisphere, Matt Dawson poses the question we're probably all asking ourselves.
Post update
Australia v Scotland (16:00 BST)
Former England captain Lawrence Dallaglio has just suggested on ITV Sport that the difference that the southern hemisphere sides have over their northern rivals is an markedly superior ability to "pass and catch the ball".
Is it that simple? Have teams in the north got so caught up in pumping iron, popping supplements and learning complex defensive systems that they have forgotten the simple joy of playing off-the-cuff rugby?
That might be a big part of it.
Team news
Australia v Scotland (16:00 BST)
Key Australian duo David Pocock and Israel Folau have failed to overcome injuries in time to face Scotland in Sunday's World Cup quarter-final.
Ben McCalman and Kurtley Beale replace the duo at number eight and full-back respectively.
Flanker Michael Hooper returns from a one-week suspension incurred for a dangerous clear-out.
Australia: Beale, Ashley-Cooper, Kuridrani, Giteau, Mitchell, Foley, Genia; Sio, Moore (capt), Kepu, Douglas, Simmons, Fardy, Hooper, McCalman.
Replacements: Polota-Nau, Slipper, Holmes, Mumm, McMahon, Phipps, Toomua, Cooper.
Very fancy dress
Australia v Scotland (16:00 BST)
The Wallbies have brought some serious fancy-dress apparel to this quarter-final.
It is going to take more than some Tam O' Shanters to top that.
The streets are full of gold
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After Ireland's exit, it's all down to Scotland to bring some joy to the northern hemisphere.
No pressure then.
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Australia v Scotland (16:00 BST)
There are still some Argentina players bouncing on the Millennium Stadium turf like Zebedee after their win over Ireland in today's first quarter-final.
Scotland are the last European side left standing and the last-eight score so far stands at southern hemisphere 3-0 Northern hemisphere.
Judging by the Pool stages, the gap between Tier One and Tier Two nation may have been narrowing.
Judging by the knock-out stages so far, the class divide between the northern hemisphere and the southern hemisphere may be creaking wider.
Fair? If so, what are the Rugby Championship nations doing different and how can our friends in the north catch up?
Your remedies of Europe's woes to #bbcrugby on Twitter and 81111 on text from UK phones.
BBC Coverage
BBC Radio 5 live coverage underway
Simply click on the coverage tab at the top of this page, to enjoy all the pre-match build-up.
Ford and J Gray start for Scotland
Australia v Scotland (16:00 BST)
The bookmakers will be tweaking the numbers on offer for Scotland in the past hour.
After hooker Ross Ford and second row Jonny Gray successfully appealed on Saturday against the three-week bans picked up for an over-eager clear-out against Samoa, both were available to be slipped into the Scotland team at late notice.
Coach Vern Cotter has pulled the ripcord. Fraser Brown and Tim Swinson drop to the bench.
Scotland line up thus:
Scotland: Hogg, Maitland, Bennett, Horne, Seymour, Russell, Laidlaw (capt); Dickinson, Ford, Nel, J Gray, R Gray, Cowan, Hardie, Denton.
Replacements: Brown, Reid, Welsh, Swinson, Strauss, Pyrgos, Vernon, Lamont.
Wallabies bounced out?
Australia v Scotland (16:00 BST)
Scotland were not favourites on a sleety evening in June 2012 either.
They had lost their previous seven matches and were playing a Wallabies side ranked second in the world.
Australia did not see the game as worthy of a weekend big-city billing. Instead it was played on a Tuesday evening in Newcastle, New South Wales.
And Scotland won.
Just as they did, in similarly dogged defensive style, at Murrayfield three years before.
Scots need the "game of their lives"
Australia v Scotland (16:00 BST)
Former Australia international Michael Lynagh says the Scots must "play the game of their lives" to win.
The bookies think Australia by 11-15 points.
History tells us that the Wallabies have won more than twice as many of their previous meetings as Scotland.
Fortunately the Scots have shown before they can shake off their underdog tag and pull off a big upset.