Stoinis hits sublime 17-ball fifty to guide hosts to seven-wicket win
Both sides have now won one, lost one
Aus 158-3 (16.3 overs): Stoinis 59* (18); Dhananjaya 1-18
SL 157-6 (20 overs): Nissanka 40 (45), Asalanka 38* (25); Maxwell 1-5
Time for us to call it a day there.
I'll also leave you with some of the best clips from that game for you to watch again too.
We'll be back from 04:45 GMT on Wednesday morning for England v Ireland, followed by New Zealand v Afghanistan.
We'll see you then.
Sri Lanka captain Dasun Shanaka: "We started well but in the middle overs we didn't get going so we would have missed around 15 or 20 runs.
"The fast bowlers are not well prepared and have injuries so that's why we're struggling with injuries now.
"It was tough with the new ball and it's too hard to get going. It was in the latter part of the game Australia played really well.
"We were five out of 10 today."
Want to watch Marcus Stoinis take Wanindu Hasaranga apart?
Of course you do.
Australia captain Aaron Finch: "We're very happy. My innings was unusual and poor. I just couldn't hit the ball. I thought the way we approached it with the bat was fine. We knew the first four or five overs would be tough. It would have been nice if I'd been able to kick on a bit earlier.
"They bowled a hard length, it was tough. It is such a big ground you feel like it is just hard to stand and deliver especially with a little bit of extra bounce and the ball is seaming a little bit. That is no excuse for the way I played but it was nice to get the win.
On Marcus Stoinis: "It was a pretty special innings. To come out with that intent is the main thing, when you come out with that presence it is one of main things in T20 cricket and with his power, that makes him pretty hard to stop."
Australia batter Marcus Stoinis: "Once I got in the plan was to keep going. To be honest, I was nervous being at home with lots of family and friends but really happy with what I put out there.
"Mentally, I was nice and fresh. I had some time off and so far so good.
"We played here at Perth the other day against England and it's a beautiful ground and got a beautiful wicket. Australia have got the technology and lighting going and it's my home ground.
"We wrap this game up and look forward to playing England at the MCG on Friday. They are a very good team and we'll do our homework and go from there."
Australia didn't hit a boundary in the first seven overs of their chase, but then a flick was switched and they started to attack.
There were some lusty blows, and Mitchell Marsh, Aaron Finch and Glenn Maxwell all chipped in.
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Marcus Stoinis had one hell of a day out.
He was superb.
Going into this game Australia's net run-rate was -4.45.
It is now -1.555 so it has jumped significantly in the right direction.
They know they probably need to win their three remaining games to stand a chance of going through though.
Marcus Stoinis finished 59 not out off 18 balls. He hit four fours and six sixes.
Captain Aaron Finch was very scratchy, but ends unbeaten on 31 off 42 balls.
"A good but ugly win," says Murray Goodwin.
Australia won't care. They needed to win today and they've done just that.
And just like the hosts and defending champions get their first win on the board.
They win with 21 balls to spare. That will help their net run-rate.
Clint Wheeldon
BBC Test Match Special
It's a crunching shot! The Australians are just four runs short of victory. Stoinis has been immense since coming out.
Need four off 22 balls
Marcus Stoinis has got a dinner reservation.
He clobbers another six over mid-wicket.
Australia are one hit away all of a sudden. This has raced along in the last 10 minutes.
Clint Wheeldon
BBC Test Match Special
Stoinis stands and delivers. He brings up his half-century in the biggest possible way.
Aus 146-3; need 12 from 24 balls
Three sixes in the over!
A rank full toss from Maheesh Theekshana is smacked back over his head by Marcus Stoinis.
That brings up his half-century off 17 balls too.
Murray Goodwin
Former Zimbabwe batter on BBC Test Match Special
That's a lot better than last week. Amazing thing about Stoinis is his striking.
Need 20 from 27 balls
He's gone again! An outrageous shot over cover this time.
Make it 46 off 15 balls for Marcus Stoinis.
Need 26 from 28 balls
Marcus Stoinis wants this done. He clubs another six back down the ground, just the 85m this time though.
Stoinis has 40 off 14 balls.
Clint Wheeldon
BBC Test Match Special
Stoinis against one of the best bowlers in the world in this format. The Australians close in on victory.