Stephan Shemilt
BBC Sport in Sydney

"As the shadows begin to creep across the SCG, we get a perfect demonstration of how difficult it is to be a bowler in an ODI. Powerplay, three men outside the ring; third man, fine leg, deep square. Shami is going to bowl short. He knows it. Finch knows it. The crowd know it and the man watching on TV in Mumbai knows it. The result? A flick to fine leg for four."

A change of ends for Mohammed Shami as India captain MS Dhoni rotates his pace triumvirate. Maxwell steps back and slashes a two over the keeper, while Finch helps another ball down the leg side for four. At times like this, captains would want at least 12 fielders, or maybe 14, to plug all those gaps.

Allan Border
Ex-Australia captain on BBC Test Match Special

"I think Maxwell's got a bit of a licence to take his time. He can take a look at a dozen balls or so, and then really go for broke."

Listen to TMS commentary via the audio icon.

Yadav's radar is all over the place, another wide makes it three for the over and five for the innings - nearly a whole extra over for Australia. And the stage is set, with 15 overs left, for Maxwell - once dubbed "The Big Show" - to tee off, big time.

Nitin Srivastava
BBC Hindi in Sydney

"India are bowling too short to Australia, especially on a flat wicket. Bowlers getting exposed!"

They crossed on the catch, so it's Finch to face Yadav - who sends down two post-drinks wides, trying to test the opener with the short ball. A leg bye brings Maxwell on strike (and brings up 200), and he's off the mark with his first ball, flicking a four off his legs.

Jim Maxwell
BBC Test Match Special

"India have made the breakthrough, but it could be an untimely one, with Glenn Maxwell coming in. We've seen teams from this position score at least 150 or 160 in the last part of the innings."

As Allan Border predicted, Glenn Maxwell is the new batsman - but before he can join the action, the umpires signal for a drinks break.

And just as suddenly, it's all over for Smith as he top-edges a pull shot from the recalled Umesh Yadav and is pouched at deep mid-wicket. A breathtaking innings from the new golden boy of Australian cricket. But there is plenty of firepower to come.

Scorecard

Image source, Getty Images

Jim Maxwell
BBC Test Match Special

"It's so hard to bowl in these powerplays. Whatever you do, if you get clubbed beyond the infield, it's four."

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This isn't the best Mohit Sharma has ever bowled, he sends down a full toss to Smith - who's bowled a few of those in his time - but the bowler gets lucky when the Australian number three can only hit it straight to Virat Kohli at cover.

"But he soon resumes his assault on the Indian bowlers, belting Mohit back over his head for four. Even when he's off balance, he's taking singles at will. The bowler goes round the wicket, but Finch channels his inner Jos Buttler, stepping across and ramping him over fine leg for four more. 16 from the over.

Image source, AP

Andrew Samson
BBC Test Match Special statistician

"Steve Smith is the first Australian to score a 100 in a World Cup semi-final. He is the fifth man overall, after Graeme Gooch, Saeed Anwar, Sourav Ganguly and Mahela Jayawardene."

Image source, Getty Images

Allan Border
Ex-Australia captain on BBC Test Match Special

"I wouldn't mind having a little wager that young Glenn Maxwell is the next man out here."

Mohit Sharma has had a change of ends, banging in a slower-ball bouncer and Finch, with a horizontal bat, smashes it for six over cover. Where do India go from here?

Allan Border
Ex-Australia captain on BBC Test Match Special

"Great knock by Steve Smith. The pressure was on when Australia lost that wicket but he has not looked in any trouble at all. He's carried on from where he left off in the quarter-final, hitting the ball so sweetly."

Listen to TMS commentary via the audio icon.

Image source, Getty Images

Smith clears his front leg and launches Shami for six over cow corner, while helping another four through fine leg to bring up his century from 89 balls. He lifts off his helmet and raises his bat in celebration - what an innings to play in a World Cup semi-final.

Image source, Getty Images

Kishin Mahtani: If Finch does not get going it might be better for Australia to run him out. Reminds me of @GeoffreyBoycott - too slow batting.

Australia take the batting powerplay three overs before they're obliged to do - and India turn back to the pace of Mohammed Shami. In contrast to Rohit's fumble last over, Ravindra Jadeja pulls off a great stop at backward point which earns him a pat on the bottom from a couple of appreciative team-mates. But with only three men allowed outside the ring, when Shami strays onto the pads, Smith helps it down to fine leg for four to move to 90.

Vikas Pandey
BBC Monitoring

"Indian Twitter users seem to be putting faith in captain MS Dhoni's skill in coming up with 'out of the box' ideas as Australians are beginning to dominate the match. A hashtag called #DareToBeDhoni is trending on Twitter and fans are using it to suggest ideas to the skipper. One tweet says 'Dhoni needs to bring in the faster bowlers now. The spinners aren't working now.'"

Still blue skies at the SCG - no clouds on the horizon for the co-hosts, though there's a batting powerplay creeping up on them in the next few overs. (Though unlike England, other batting sides seem to take advantage of it). A reverse-swept two from Finch brings up the 150 partnership, while some schoolboy fielding from Rohit Sharma hands Smith some bonus runs as he lets one straight through him at point.