SL 51-1published at 5.4 overs
Asalanka is timing the ball beautifully while Perera is riding his luck. He goes for a pull shot off Cummins, gets a top edge that flies over the keeper for four more.
When it's your day ...
Australia chase 155 with 18 balls left
Second victory from two games
Warner 65 (42) - dropped on 18
Finch 37 (23), Smith 28* (26)
Sri Lanka 154-6: Perera 35 (25)
Asalanka 35 (27), Rajapaksa 33* (16)
Zampa 2-12, Starc 2-27
Super 12s, Group 1, Dubai
Australia face England on Saturday
Ffion Wynne and Callum Matthews
Asalanka is timing the ball beautifully while Perera is riding his luck. He goes for a pull shot off Cummins, gets a top edge that flies over the keeper for four more.
When it's your day ...
Stuart Law
Former Australia batter & West Indies coach on BBC Test Match Special
Pat Cummins because he can bowl, bat and field. I've worked with him before and he is an absolute champion of a bloke too.
He has an X-factor about him.
Simon Mann
BBC Test Match Special
If you could only pick one of Josh Hazlewood, Mitchell Starc and Pat Cummins who would you pick?
And a single off the final ball to hog the strike, too. Asalanka wants to do this all by himself!
Things you love to see.
He slogs him straight down the ground for four, of course!
It's a proper slog, too - but it works! David Warner puts in a full-length dive to prevent the boundary but fails.
Hazlewood helps Australia recover with four dot balls to start his over. What does Asalanka do here?
Stuart Law
Former Australia batter & West Indies coach on BBC Test Match Special
The pitches have been slow and low but this one looks like it is skidding on a bit more.
Sri Lanka are absolutely up for this challenge and up for causing an upset here. It's great viewing.
Simon Mann
BBC Test Match Special
Sri Lanka have made a flying start here.
Five wides!!! It's all going horribly wrong for Australia and Asalanka has put them under immense pressure.
Another four, this time carved past point! Pressure on Maxwell.
Stuart Law
Former Australia batter & West Indies coach on BBC Test Match Special
The young man is certainly looking confident.
Simon Mann
BBC Test Match Special
That is a magnificent stroke from Charith Asalanka. What a start it has been from him.
He didn't even bother to take a look at Glenn Maxwell.
And welcome to the attack! First six of the day and of course, it's from Asalanka. Slog swept into the stands effortlessly. As you do.
Here's Glenn Maxwell, who is most definitely a contender for the Worst Hairstyle of the World Cup award.
A mixed bag for Australia that over. A wicket but costs 14 runs.
Four more! Asalanka capitalises on the free hit, lofting a Cummins full toss over mid-off.
Delightful.
Stuart Law
Former Australia batter & West Indies coach on BBC Test Match Special
That is a beautiful shot and a great way to start your innings.
Well, that's one way to get off the mark! Asalanka, the hero of Sri Lanka's win over Bangladesh, pulls his first ball for four with the most exquisite timing.
It's a beautiful shot and to make it worse for Cummins, it's a no-ball. Free hit incoming!
Stuart Law
Former Australia batter & West Indies coach on BBC Test Match Special
There was a change of field there from Aaron Finch. David Warner just had to jog 10-15 yards and he took a simple catch.