Mohammad Nabi is keeping some semblance of control on proceedings but the Sri Lanka openers still work their way around the field, picking the games and knocking the singles here and there.

An annoyed grunt from Kusal Perera as he gets a long-hop to have a look at and he carves it straight to the man on the edge of the circle.

Martin in Newcastle:The 500 is on. Let's go Sri Lanka

Googly from Mujeeb, and Perera just about picks it, before he paddles the next one to the waiting man at short fine leg.

Hello! Up and over from Kusal Perera, dancing down the pitch, and he just misses out on a six as the ball thuds right into the boundary rope.

Mujeeb overcompensates, dropping too short, and it's all too easy for Perera to lean back and cut him for another four.

Niall O'Brien
Ex-Ireland wicketkeeper on TMS

Afghanistan have been very wayward. It's one of those days when they get so carried away and try so hard.

Much better from Mohammad Nabi, tying the Sri Lanka openers down, and they'll have to settle for a smattering of singles.

Gulbadin Naib rings the changes - it's double spin time, with Mohammad Nabi brought in to the attack.

After the shambles of the other day, this has been a corking start from Sri Lanka.

In the air! Kusal Perera goes after Mujeeb's first ball, but he flicks it just short of the man in the deep as he tries to sweep him into oblivion.

Perera lets a few dot balls go by before he hustles down the pitch and works him through the leg side for four.

Unsurprisingly, there's a change afoot.

The 18-year-old off-spinner Mujeeb Ur Rahman comes in to the attack.

Phil Long
BBC Test Match Special statistician

Hamid Hassan - two overs for 30 this morning.

And Dawlat Zadran unfurls a beauty to end the over!

Away movement and the ball just avoids grazing the outside edge of Karunaratne's bat.

Phil Long
BBC Test Match Special statistician

There have been 17 extras in the first five overs.

This is scrappy from Dawlat Zadran, coughing up a leg side wide before another delivery is speared onto the pads and easily heads down past Karunaratne's pads for four wides.

That's Sri Lanka's fifty up, inside the first five overs.

Not saying it's cold, but Angelo Mathews is wearing a coat, jumper, beanie hat, and a giant pair of headphones up on the balcony.

Not quite timed from Kusal Perera, lofting the ball over mid-wicket, and the ball just keeps on picking up pace. A despairing dive from the man in the deep ends up harrying th ball into the rope.

Mohammad Shahzad is left incredibly unimpressed as a bouncer goes whistling over his head and away for four wides.

Since the start of 2017, Afghanistan's Rashid Khan has taken 99 ODI wickets - more than any other spinner and more than twice as many as any Sri Lankan spinner (Akila Dananjaya with 48 is the nearest to his record).

Hamid Hassan has gone for 30 runs from his two overs...

And now Kusal Perera goes up and over for four!

Lovely stuff. Mid-off comes up and Perera, quick as you like, steps forward and hoicks the ball over his head.

And again! That's a proper shot from Perera, whirling those wrists to work the ball through mid-wicket, and the ball just keeps on going.

Whoops!

That starts wide, keeps on going wide, and Mohammad Shahzad has no chance of stopping that. Five byes, and a look of annoyance on Hamid Hassan's face.