Dean Mumm holds his hands up to that one and treks off to the Australia bench for 10 minutes. 

A huge opportunity for Ireland, here, with the Australia flanker off the pitch.

Image source, PA

There's a break in play as referee Jerome Garces has technical issues - he needs a new microphone. 

It looks like he's going to take a look at an incident in the ruck. Dean Mumm appears to have tipped Tadhg Furlong over on to his neck.

It looks worse in slow-mo, but it is pretty nasty. 

Jonathan Davies is having a stormer, the centre looks like he is going to go all the way, before he is put into touch. If he had looked up Wales had an overlap there.

That was the first real attack into the South African's 22.

Simon Zebo is such a wriggly little menace. 

The Ireland winger hops clear of several Australia defenders as Ireland gain territory. 

And now it's Paddy Jackson's turn to sprint clear. What a run from the fly-half! He tries to feed up-and-behind to Andrew Trimble but the visitors turn over. 

Image source, Reuters

Elton Jantjies adds three more points.

Neither side have threatened the other's 22, but Wales are winning where it counts - on the scoreboard.

Jonathan Davies
Former Wales fly-half on BBC Two

There are opportunities for Wales on the edges of the South African defence.

They have just got to look out for them.

Another Welsh penalty, South Africa are shooting themselves in the foot here. It's Nizaam Carr who concedes it by not rolling away in the tackle. 

Leigh Halfpenny makes it three out of three.

Image source, Getty Images

Australia are penalised for not rolling away and this time Paddy Jackson decides to go for the kick. It's about time they got some numbers on the board.

From about 40 metres out, Jackson lands it. 

Alun Wyn Jones is taken out in the air in the line-out and it's another penalty to Wales just behind the 22m line, slightly to the right of the uprights.

Leigh Halfpenny takes his scrumcap off, goes through his kicking routine and makes no mistake.

Image source, Getty Images

Australia breath a sigh of relief as an Ireland scrum pulses towards the line but Will Genia is in place to clear down field. 

It's all green at the moment. 

If you want to listen to commentary of this enthralling match, you'll find it on this link thanks to BBC Radio Ulster. 

Ireland have a scrum in the middle of the park and Keith Earls springs forward, before being held up.

Australia are penalised for offside, and Ireland take the line-out, before the Wallabies are penalised again. Ireland have the advantage.

Andrew Trimble makes an excellent break down the flank but a last-ditch tackle from Dane Haylett-Petty denies the Ireland wing. 

The hosts have another line-out, as the penalties stack up, but a fantastic bit of defence sees Australia turn the ball over.

Brian Moore
Former England hooker on BBC Two

You can't underestimate what that does for the confidence of your team, knowing you have a goal kicker who can score from those areas.

As a forward it makes you put in an extra yard.

Francois Venter knocks-on in the Springboks midfield but Wales fail to take advantage of the turnover.

The Welsh win the resulting scrum, the ball is spun wide but Ruan Combrinck tries to snatch an interception. Quite harshly the winger is judged to have deliberately knocked-on. Penalty to Wales and it's easy points for Leigh Halfpenny.

Wales back on level terms.

Phil Porter: Awesome start by Ireland!

Image source, Rex Features

What a frantic start! Ireland are pegged back to the halfway point, but they push in attack again after another decent line-out.

But Andrew Trimble can't get on the end of a loose offload and it's out of play.

Breathless stuff. 

Jonathan Davies
Former Wales fly-half on BBC Two

South Africa turned pressure into points. Every time they go into the Wales 40m area they will want to come away with points.

Wales win a scrum but Tomas Francis is penalised for collapsing and Elton Jantjies gets his first sighter on goal.

The fly-half slots over from 30 yards to give the Boks the lead.

After 18 phases of pressure from Ireland, Will Genia snatches possession for Australia on the 5m line.  

But referee Jerome Garces has already awarded a penalty to the hosts. They kick to the corner again.