Michael Johnson
Four-time Olympic gold medallist athlete on BBC One

I heard from Shaunae Miller-Uibo's camp she suffered a cramp and tripped but is okay today.

As long as there is no hangover from that cramp, she should easily get through tonight.

Michael Johnson
Four-time Olympic gold medallist athlete on BBC One

With Elaine Thompson and Tori Bowie out I think Schippers is able to relax a little.

That was a very impressive race.

Shaunae Miller-Uibo - who had her 'Devon Loch' moment when set for 400m gold last night - is fit to start the second semi-final.

Let's hope she is fit enough to compete properly. She said that she is fit today.

Bianca Williams is in lane three in the second semi. Can she make it? A tough ask. The top two go through and then it's the next two fastest.

Image source, Getty Images

Colin Jackson
Two-time world 110m hurdles champion on BBC One

To me, that's the best I've seen Schippers all year.

She came off the bend supremely well. She is looking very smooth indeed. Looking forward to seeing her in the final. All control.

I couldn't agree more Kelly! I remember watching Edwards in 1995 and he remains miles ahead of the pack.

Kelly Adams: It's only watching these jumps that you realise how phenomenal Jonathan Edwards' world record is

Mark Anderson: This triple jump is unreal!

Image source, Getty Images

Great bend from Dafne Schippers as she powers away from the field, what a class athlete she is. She dials it down to win in 22.49. That was hugely impressive.

Deajah Stevens takes the second automatic spot.

Dafne Schippers leads this first 200m semi out. American Deajah Stevens upset newly-crowned 100m world champion Torie Bowie to win the US Trials in June though.

Here comes Christian Taylor, the third jump of six. Quick down the runway, effortless almost.

It's big! That's the lead, surely. Looked close to 18m.

It's 17.68! He and Will Claye have shared five jumps within 16cm of each other so far!

Christian Taylor has had a huge gauntlet thrown down at his feet. Will Claye leads by 6cms at the moment. Taylor is about to take his third effort...

Jake Wightman: "We were lucky we got to see the first two heats because we knew the time to aim for. The main aim was to get the top six and I've done that.

"This is another level this for me - the first round was going to be the test.

"I'm so used to my dad being up in the box as the stadium announcer.

"He has the best seat in the house and is able to scrutinise my every move. Not bad view for a coach."

Image source, Getty Images

Nelson Evora of Portugal is in third place after three of his jumps. It's a US shootout up top though as Will Claye and Christian Taylor duke it out.

Here's third jump for Claye, headband on - that's the lead! Massive.

It's 17.63!

Jonathan Edwards still jumped 50cm more than that. Extraordinary.

Image source, Getty Images

Dina Asher-Smith put an injury-hit year behind her to qualify as fourth fastest in 22.73 seconds – a season’s best. The British record holder finished fifth in Rio.

Can she edge into the medals this time?

There was an incredible finish to the women's 400m final last night, as Shaunae Miller-Uibo appeared to have gold sewn up only to miss out on a medal, with Phyllis Francis winning.

She is running again tonight in the 200m, the next event on track. Well, she's scheduled to anyway. Will she make it?

Allison Curbishley
BBC athletics expert on Radio 5 live

The announcer in the stadium is his father Geoff Wightman. It must have been difficult not to shout "come on Jake".

The top ELEVEN in that heat are through. Going last is such a big advantage.

Jake Wightman qualifies! Well judged. He's home in fourth.

The advantage of going last is clear again as this whole field know that they could qualify as fastest losers at least. It's a much quicker race through 800m.