Sri Lanka is so deep in the well. This is all New Zealand. It's a long road back.
WICKET
Asalanka c Allen b Boult 4 (SL 8-4)
Oh dear. A tame dismissal for Charith Asalanka as he pushes at a slower ball - it might have been a knuckle ball, in fact - from Boult and slices it to Finn Allen at backward point.
It's a smart catch, low down from Allen but Sri Lanka have imploded and having started this match so well, their chances may have disappeared before the powerplay is even finished.
SL 6-3
Target 168
Just that one ill-advised single from the over. Southee has figures of 1-1 from his two overs. Useful in any form of the game, let alone in the powerplay of a T20.
Post update
Stuart Clark
Former Australia fast bowler on Test Match Special
I don't know how he missed it. He could have almost run to the stumps.
SL 6-3
Target 168
Sri Lanka's collective brain is well and truly scrambled. After another three dot balls to start Southee's second over, Charith Asalanka nudges the ball into the leg side.
He calls for a single that is never on and Bhanuka Rajapaksa gives up well before he reaches the crease. Thankfully for him and Sri Lanka, Jimmy Neesham misses with a stump and a bit to aim at.
Post update
Stuart Clark
Former Australia fast bowler on Test Match Special
It's just the wrong shot on this wicket. There's just a little bit on offer with the new ball. The tactical coach should have said our runs will come in the second half of the innings.
WICKET
Dhananjaya b Boult 0 (SL 5-3)
It goes from bad to worse for Sri Lanka.
Dhananjaya de Silva tries to guide the ball down to third but it is far too close to him - there's a hint of movement, too - and he drags the ball onto his stumps.
New Zealand were 15-3, Sri Lanka are making that look like a decent start. They need to be careful or this could get very ugly.
Post update
Stuart Clark
Former Australia fast bowler on Test Match Special
Sri Lanka are in a world of trouble now with both openers out.
WICKET
K Mendis c Conway b Boult 4 (SL 4-2)
Edged and gone! Sri Lanka are in trouble early in the chase.
Two balls after crashing the ball to the fence off the back foot, Mendis is dragged forward by Trent Boult and nicks behind on the drive.
New Zealand had a similarly bad start. Who can be Sri Lanka's Glenn Phillips?
Post update
Stuart Clark
Former Australia fast bowler on Test Match Special
There is not a batter in the world that would not hit that ball for four. He smashed it. A good way to start the innings.
SL 4-1
That should help Sri Lanka, Kusal Mendis thumps a wide delivery away through the covers for four!
SL 0-1
Target 168
The perfect start for New Zealand. Tim Southee begins with a wicket maiden, the momentum stays firmly with the Black Caps.
Post update
Stuart Clark
Former Australia fast bowler on Test Match Special
There's was no option but for the umpire to raise the finger.
Post update
Andrew Moore
BBC Test Match Special
That was plumb with a capital P!
WICKET
Nissanka lbw b Southee 0 (SL 0-1)
The pressure tells and Pathum Nissanka is out, plumb lbw!
He hadn't been able to get the ball past the in-field so tries to force things with a big swipe towards the leg side, misses and it struck on the back leg.
It looks stone dead and he wisely decides not to review. Superb bowling from Southee.
SL 0-0
Target 168
A very good start from Southee. He's giving nothing away and four balls into the chase, Sri Lanka are still waiting to get off the mark.
Post update
Right then, time for the Sri Lanka chase. They need 168 to go top of Group 1, doable but they'll know it could have been so much simpler if they'd taken their chances.
Still, they need to put that behind them and think about knocking off these runs. Pathum Nissanka and Kusal Mendis will open, Tim Southee has the new ball for New Zealand.
Post update
Anyway, what is absolutely clear is how good thank knock was from Glenn Phillips.
Sure, he was given a helping hand by Sri Lanka's fielders but even so that was a pretty special hundred. No other New Zealand batter looked entirely comfortable but he smashed it to all parts!
Post update
Thanks, Ffion. That really was quite something from Glenn Phillips!
As for whether a New Zealand win helps England or not, I'd say not. But it's all so close that it's hard to be absolutely sure what is best for Jos Buttler's team.
A Sri Lanka win would put them top of the group, a point ahead of New Zealand, England, Ireland and Australia and it would mean that if England win their last two games they shouldn't have to worry about net run-rate.
I think.
Post update
On that note, I'm going to pass that one over to Sam Drury to explain, and take you through Sri Lanka's chase.
Live Reporting
Sam Drury
All times stated are UK
Post update
Andrew Moore
BBC Test Match Special
Sri Lanka is so deep in the well. This is all New Zealand. It's a long road back.
WICKET
Asalanka c Allen b Boult 4 (SL 8-4)
Oh dear. A tame dismissal for Charith Asalanka as he pushes at a slower ball - it might have been a knuckle ball, in fact - from Boult and slices it to Finn Allen at backward point.
It's a smart catch, low down from Allen but Sri Lanka have imploded and having started this match so well, their chances may have disappeared before the powerplay is even finished.
SL 6-3
Target 168
Just that one ill-advised single from the over. Southee has figures of 1-1 from his two overs. Useful in any form of the game, let alone in the powerplay of a T20.
Post update
Stuart Clark
Former Australia fast bowler on Test Match Special
I don't know how he missed it. He could have almost run to the stumps.
SL 6-3
Target 168
Sri Lanka's collective brain is well and truly scrambled. After another three dot balls to start Southee's second over, Charith Asalanka nudges the ball into the leg side.
He calls for a single that is never on and Bhanuka Rajapaksa gives up well before he reaches the crease. Thankfully for him and Sri Lanka, Jimmy Neesham misses with a stump and a bit to aim at.
Post update
Stuart Clark
Former Australia fast bowler on Test Match Special
It's just the wrong shot on this wicket. There's just a little bit on offer with the new ball. The tactical coach should have said our runs will come in the second half of the innings.
WICKET
Dhananjaya b Boult 0 (SL 5-3)
It goes from bad to worse for Sri Lanka.
Dhananjaya de Silva tries to guide the ball down to third but it is far too close to him - there's a hint of movement, too - and he drags the ball onto his stumps.
New Zealand were 15-3, Sri Lanka are making that look like a decent start. They need to be careful or this could get very ugly.
Post update
Stuart Clark
Former Australia fast bowler on Test Match Special
Sri Lanka are in a world of trouble now with both openers out.
WICKET
K Mendis c Conway b Boult 4 (SL 4-2)
Edged and gone! Sri Lanka are in trouble early in the chase.
Two balls after crashing the ball to the fence off the back foot, Mendis is dragged forward by Trent Boult and nicks behind on the drive.
New Zealand had a similarly bad start. Who can be Sri Lanka's Glenn Phillips?
Post update
Stuart Clark
Former Australia fast bowler on Test Match Special
There is not a batter in the world that would not hit that ball for four. He smashed it. A good way to start the innings.
SL 4-1
That should help Sri Lanka, Kusal Mendis thumps a wide delivery away through the covers for four!
SL 0-1
Target 168
The perfect start for New Zealand. Tim Southee begins with a wicket maiden, the momentum stays firmly with the Black Caps.
Post update
Stuart Clark
Former Australia fast bowler on Test Match Special
There's was no option but for the umpire to raise the finger.
Post update
Andrew Moore
BBC Test Match Special
That was plumb with a capital P!
WICKET
Nissanka lbw b Southee 0 (SL 0-1)
The pressure tells and Pathum Nissanka is out, plumb lbw!
He hadn't been able to get the ball past the in-field so tries to force things with a big swipe towards the leg side, misses and it struck on the back leg.
It looks stone dead and he wisely decides not to review. Superb bowling from Southee.
SL 0-0
Target 168
A very good start from Southee. He's giving nothing away and four balls into the chase, Sri Lanka are still waiting to get off the mark.
Post update
Right then, time for the Sri Lanka chase. They need 168 to go top of Group 1, doable but they'll know it could have been so much simpler if they'd taken their chances.
Still, they need to put that behind them and think about knocking off these runs. Pathum Nissanka and Kusal Mendis will open, Tim Southee has the new ball for New Zealand.
Post update
Anyway, what is absolutely clear is how good thank knock was from Glenn Phillips.
Sure, he was given a helping hand by Sri Lanka's fielders but even so that was a pretty special hundred. No other New Zealand batter looked entirely comfortable but he smashed it to all parts!
Post update
Thanks, Ffion. That really was quite something from Glenn Phillips!
As for whether a New Zealand win helps England or not, I'd say not. But it's all so close that it's hard to be absolutely sure what is best for Jos Buttler's team.
A Sri Lanka win would put them top of the group, a point ahead of New Zealand, England, Ireland and Australia and it would mean that if England win their last two games they shouldn't have to worry about net run-rate.
I think.
Post update
On that note, I'm going to pass that one over to Sam Drury to explain, and take you through Sri Lanka's chase.