- Skipper Karunaratne makes 97 but Starc's 4-55 proves decisive
- Sri Lanka lose last eight wickets for 61 runs
- Finch hits 153 off 132 balls as Australia recover from slow start to post 334-7
- Australia lost momentum, however - falling from 273-2 after 42.3 overs
- Smith 73, Maxwell 46*, Dhananjaya 2-40
- Sri Lanka won toss; Aus third in group table & SL fifth
More from Australia captain Aaron Finch: "I thought we were a tad short with the new ball and it’s so hard to pull it back after that. We were a bit slow to change our plans and lost a bit of momentum.
"The long boundary really helped Glenn Maxwell when he was bowling. We found it difficult to get 10 overs out of him in Taunton because of the small boundary so it was nice to have that today.
"With each game we’re improving. Through the middle overs today we were excellent with the way we pulled it back with our pace bowlers and Maxy. Mitch was all over them, he is a world class bowler."
Sri Lanka captain Dimuth Karunaratne: "It was a pretty good wicket and I thought there would be some seam movement but there wasn't much. We bowled really well in the first 25 overs but Finch and Smith batted really well in that period and after that we battled back well.
"We got a good start with the bat but our middle order couldn't capitalise on that. Starc and Cummins are world class bowlers, we need to come up with a plan about what we can do i that period.
"We need to win a couple of games against the top sides to make the top four."
Ben Wire: Can't help but feel Sri Lanka lost their bottle... this was there for the taking.
Australia captain Aaron Finch: "It was nice to get a couple away earlier, particularly drives, my balance was spot on.
"It was a nice wicket and I've been working on not letting my head fall over and keeping my balance spot on. Just being sharp those first few balls is key.
"We lost a few quick wickets but there were a couple of useful partnerships to get us to 330+."
On Steve Smith: "He just hits the ball in the gaps. I looked up at one point and thought he'd on five or six and he was actually on 25, he's so good at getting off strike."
- SMS Message: Two words: Missed opportunity. How can Sri Lanka score 90 in the first 10 overs, then take just 46 runs off of Maxwell's 10 overs, he's a part-timer! from Gareth
Ex-England batter on BBC Test Match Special
Sri Lanka really struggled against Glenn Maxwell. He didn't bowl anything electric, he just bowled stump to stump and kept control of the game.
That was a victory built on Aaron Finch's magnificent 153, and then finished off by Mitch Starc's 4-55.
Australia had a bit of a scare but their quality has shone through.
There was a brief moment where it looked like Sri Lanka might do what looked impossible, but Mitch Starc saved the day for Australia again.
That takes Australia to the top of the table.
It's all over, folks.
I can't help but feel disappointed that it's come to this - it had been an entertaining game.
Nuwan Pradeep almost swings himself off his feet as he hacks at Kane Richardson's final delivery.
That over had everything you could want and more.
High in the air goes Dhananjaya - and it drops down safely at mid-on!
At least Dhananjaya is playing a few shots now.
Dhananjaya de Silva plays the most astonishing upper ramp flick over his shoulder to his next ball to get four!
Soft signal was not out...
...and not out it is! On we go. Sorry, Simon.
Please just give it out.