The calm before the storm at the moment as Dhananjaya de Silva probes away with his off-breaks.

Hashmatullah Shahidi and Azmatullah Omarzai,content to nudge and nurdle at the moment.

There's a bit of dew on the ground so the ball may skip on to the bat a little bit more you would think.

Thanks, Tom.

I think Afghanistan would have taken a chase of around a hundred odd off the last 20 overs with seven wickets in hand.

But Sri Lanka are not quite done yet. A couple of wickets could swing the momentum back their way.

With this match looking set for a thrilling conclusion, it is time for me to take a break.

Here is Timothy Abraham to guide you through the rest of the innings.

Lydia Greenway
Former England batter on BBC Test Match Special

Hasmatullah Shahidi won't want to bat the majority of the time now. You don't want to expose Mohammad Nabi and Rashid Khan too much.

Kasun Rajitha has bowled a tight line since coming back into the attack and is cramping the Afghanistan batters for room.

Azmatullah Omarzai nervously pushes at one outside off stump and very nearly nicks it through to the wicketkeeper.

Suddenly the whole feeling around this match has changed..

Azmatullah Omarzai is the new batter and joins Hashmatullah Shahidi, who plays a loose sweep-shot that flies into the air and only just evades Angelo Mathews at short fine leg.

All of a sudden Afghanistan look nervy and it is Sri Lanka who are buzzing around the field.

Lydia Greenway
Former England batter on BBC Test Match Special

We were talking about complacency and looking at the replay when you're new to the crease you would be looking to hit that down the ground but when you're into your innings you try and work it into the leg side.

That is a big moment in the game, you would think. Rahmat is one of the more experienced batters in the Afghanistan side.

Scott Read
BBC Test Match Special commentator

Image source, Getty Images

Well it wasn't costly! That might spark some life into Sri Lanka.

Lydia Greenway
Former England batter on BBC Test Match Special

That could prove to be costly. You wouldn't say it was a tough chance.

Rahmat Shah dropped on 62published at 27.5 overs

27.5 overs

Rahmat Shah cuts the ball towards point but Sadeera Samarawickrama spills the catch!

How big a moment could that be?

Afghanistan are strong favourites according to WinViz.

Image source, CricViz/BBC Sport

Lydia Greenway
Former England batter on BBC Test Match Special

It feels like something special is going to have to happen for Sri Lanka to win this game.

I have been really impressed with Afghanistan. It has been a very mature performance and it is not the first time in this tournament.

This is well worth a watch. It contains some beautiful shots from Rahmat Shah on his way to a half-century.

Change of bowling at the other end as we get to see Dhananjaya de Silva's off spin for thr first time this match.

His first ball is very much a loosener that Rahmat Shah clatters through the covers for four.

That instantly takes the pressure off the rest of the over, with just a single coming off it to move the partnership up to 53 from 61 balls.

Lydia Greenway
Former England batter on BBC Test Match Special

It is such a cliche but you can just sneak in down the side if you peak at the right time.

Abhishek Jhunjhunwala
Former IPL batter on BBC Test Match Special

If you're a cricket fan you've got to love Afghanistan because of the brand of cricket they are playing and their story. It is extraoindary where they have come in four years.

Image source, CricViz/BBC Sport

Change of bowling as the pacey Kasun Rajitha returns for his fifth over. Sri Lanka need to do something to try and break this partnership.

Just the one run off it as Afghanistan wisely take no risks, though it could have been more expensive but for a brilliant diving stop by the fielder at backward point.

Abhishek Jhunjhunwala
Former IPL batter on BBC Test Match Special

If Afghanistan win this game they will be on six points and they are playing the Netherlands next. That will really start to put pressure on Australia, especially if they lose to England on Saturday.

Afghanistan finish with games against Australia and South Africa but they have already beaten England and Pakistan who are World Cup winners. There are chances they win one of those two games and beat the Netherlands and end up with 10 points.

And there's four more. Rahmat Shah is served up a short delivery from Dushmantha Chameera and makes no mistake, pulling the ball powerfully to the rope.

Seven off the over in total as Afghanistan continue on their merry way.