Jonathan Agnew
BBC cricket correspondent on Test Match Special

Joe Root checked his shot there - it demonstrates that it's in his mind that the ball might stop on him and he might pop up a catch to cover.

Dawid Malan aims a violent stroke leg side as Mustafizur continues but doesn't get all of it and has to settle for a single to the man in the deep.

Joe Root then picks out backward point with a well-timed shot before finding extra cover next ball with a drive.

He does then pull for a single. Just the two from the over.

Thanks, Stephan.

England are going along very nicely at the moment. The platform has been built, it's just a matter of how well Jos Buttler's side can use it.

Shakib won't bowl his 10, replaced by Mehidy Hasan. Root waits, still, in his stance and leaning over his bat. Singles the order of the day. Four off the over. Here's Sam Drury.

Michael Vaughan
Former England captain on BBC Test Match Special

Image source, Getty Images

That's the second time that Joe Root has had a little bit of fortune. He's chipping it nicely into the gaps!

The Fizz is back. He seems OK. It would be poetic for him to take the wicket of Root, who then offers a leading edge that drops safe of mid-on. Touch of a charmed life for the former Test skipper so far.

Michael Vaughan
Former England captain on BBC Test Match Special

It looks like he's just twisted his knee a little bit.

Prakash Wakankar
BBC Test Match Special

Trouble all round. I hope Mustafizur hasn't hurt himself.

Strange one. Mustafizur Rahman back on. Running in, but Joe Root backs away at the last minute. Mustafizur is almost through his action and goes over, hitting the deck. Now the physio is out there. Looks like a right ankle problem.

Michael Vaughan
Former England captain on BBC Test Match Special

There will be more of that throughout the day which is why I'm surprised that Bangladesh chose to field first.

Shakib is still bowling beautifully. He's found some grip in the surface and could bowl his 10 all the way through. England have gone with the extra seamer today, but it could turn later on.

Michael Vaughan
Former England captain on BBC Test Match Special

England are playing great. Jonny Bairstow wasn't at his fluent best today but it was a really solid partnership with Dawid Malan, who has made it look so, so easy.

The cameras have just picked up some shots of Jonny Bairstow. Despite making 52, he looks livid. Probably feels like he left at least 48 out there.

Prakash Wakankar
BBC Test Match Special

Beautiful. How classy was that shot? Just comfortable and well controlled. Nothing wrong with that from Joe Root.

It doesn't work like that, Tim. Majestic from Root, back over Mehidy Hasan's head for four.

Tim Ness: Pushing South Africa's score? That wicket is on you, Stephan!

Not only has he taken the wicket, but Shakib is the only Bangladesh bowler to have an economy less than five. He won't like this, though. A poor effort on the point fence gifts a boundary to Dawid Malan. There are some worried faces in the Bangladesh dugout.

Steven Finn
Former England bowler on BBC Test Match Special

If Bangladesh do not take wickets between now and the 30th/35th over, that right and left hand combination is going to cause a huge problem for Bangladesh.

It can't be both of you, can it? Why don't you go outside and sort it out?