Paula Radcliffe
Former women's marathon world record holder on BBC One

That was a very messy race.

Jess Hull is smiling and that shows she feels happier with that race. She always smiles at the end of races to be honest, but I do think she looked better there. She controlled the race and that would've done her confidence the world of good.

Nikki Hiltz didn't look as sharp as I expected, perhaps she was just trying to ensure qualification to the final.

Australia's Jess Hull takes the second semi-final, ahead of Kenya's Nelly Chepchirchir.

The field was extremely tight until around the final lap, with some tripping and stumbling in there, but the two favourites in this race broke away at the close.

Great Britain's Revee Walcott-Nolan finishes outside of the six qualification spots.

Paula Radcliffe
Former women's marathon world record holder on BBC One

Gabriela Debues-Stafford is working her way back to full form. That first heat would have taken a lot out of her, I think it's taken a lot out of many of these athletes.

It is difficult to bounce back for the next day in these conditions and that's why we're seeing this heat go so pedestrian now...

Faith Kipyegon eases through to the final with a time of 4:00.34, finishing ahead of fellow Kenyan Dorcus Ewoi.

Meanwhile Freweyni Hailu of third takes third despite falling during the race, with six qualifying for the final.

No time for a breather, we're straight into the two women's 1500m semi-finals.

The legendary Faith Kipyegon is in the first one.

Greg Rutherford
Former world and Olympic long jump champion on BBC One

Noah Lyles is upsetting a lot of his competitors, and we saw in heat three that Oblique Seville might be wanting to silence him as well. That makes this whole event a bit more exciting.

I do think others were looking better than him in those semi-final heats, so maybe his own games are starting to catch up with him a little bit.

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

Oblique Seville has grown up and matured now. He has raced a lot more than normal coming into these World Championships, so he has been racing against these athletes all the time.

From 40 or 50 metres out, he started looking over his shoulder and it looked like he was shouting: 'Come on, what's going on here?'

He is challenging people to try to silence him, which is really interesting. He must be feeling very confident.

Jamaica's Oblique Seville takes the final semi-final!

He finishes with a time of 9.86, and holds a finger to his lips as he wheels away in celebration.

Letsile Tebogo takes the second automatic qualification position with 9.94.

Gift Leotlela is third with 9.97, which pushes Great Britain's Zharnel Hughes and Canada's Jerome Blake out of the fastest non-automatic qualifiers positions. Both slots in the final (at 14:20 BST) go to South Africans, with Akani Simbine holding onto the other one.

Britain's Romell Glave finishes in sixth.

Harry Poole
BBC Sport in Tokyo

That stare down between Kishane Thompson and Kenneth Bednarek appeared to be shared in far better spirit than when the American was previously involved in a similar situation.

Earlier this year, at the US trials, Bednarek and Noah Lyles clashed after Lyles stared down his compatriot as he beat him to the 200m title.

Bednarek responded by shoving Lyles and called him "unsportsmanlike" in a post-race interview.

This time, Bednarek exchanged a smile with Thompson after both proved a class above in their semi-final. They'll quickly return to being rivals, though, with both in with a serious chance of gold.

Andrew Cotter
BBC Sport athletics commentator on BBC One

Is there no such thing as a false start any more?

Oh and they have given it to Andre de Grasse! I would like to see that replay again, please, because I don't know what he did to put it off.

False start in semi-final three!

The reaction speed graphics suggested it was South Africa's Gift Leotlela, but it's Canada's Andre De Grasse who is shown a yellow card.

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

Kishane Thompson got out so well but he couldn't shake off Kenneth Bednarek, could he? Not at all!

They were level to each other for a large part of that race, but Zharnel Hughes and Jerome Blake were also so tight in third and fourth.

It's good to see good sprinting out there.

Kenneth Bednarek of the United States pips Olympic silver medalist Kishane Thompson in a photo finish in heat two, clocking 9.85 seconds.

Great Britain's Zharnel Hughes and Canada's Jerome Blake shared third place in 10:03, so both go into the spots reserved for the quickest non-automatic qualifiers. Britain's Jeremiah Azu drops out.

Image source, Getty Images

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

Kishane Thompson's first 30 metres is absolutely lightning at the minute. He covered 60 metres in 6.36 seconds in his first heat and he literally cruised in to the finish line.

He looked so comfortable and like a very different athlete to what we saw last year. He had a lot of pressure on him, but I think he's enjoying it this season. He clearly has the belief that he can be the champion.

Harry Poole
BBC Sport in Tokyo

Noah Lyles never appears to be quite there. Until he is.

The American comes through in the second half of the 100m stronger than anyone in the game and always manages to find enough at the end to do just enough.

It keeps the crowd on the edge of their seats until the very end. The excitement really is building now with the action coming thick and fast.

That seven minute spell encompassing the two finals is going to be electric - and some.

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

There was no showboating from Noah Lyles there, was there? He had to be very serious.

He got out of the blocks reasonably well, nothing electric for him but he kept himself in contention in that sense. He made his movement very late though - I expected him to get on people's shoulders much earlier than that, but instead he had to keep pressing through to the line.

He snuck the victory there from very inexperienced teenager Kayinsola Ajayi. The most important thing is that he's through to the final though.

After yesterday's qualifying event, 12 athletes seek glory in the women's long jump final that has just got going.

The favourite for the event is Tara Davis-Woodhall of the United States, who hasn't lost a long jump final since taking silver in the world championships two years ago. She won gold in the Paris Olympics and qualified with the best jump on Saturday, reaching 6.88m.

Germany's Malaika Mihambo is also in the field - she's a three-time world champion, and took silver in the French capital last summer, but only qualified in ninth.

Jazmin Sawyers of Great Britain didn't make it through qualifying, finishing 16th of 34 competitors.

Greg Rutherford
Former world and Olympic long jump champion on BBC One

I would love to see Shelly-Ann Fraser-Pryce do this for one last time.

Her legacy within this sport is incredible. She is one of the greatest-ever and I'm so happy to see her in the final, it is brilliant to see.

Dame Jessica Ennis-Hill
Three-time world heptathlon champion on BBC One

There was a lot of luck involved in that semi-final heat for Sha'Carri Richardson.

She came out of her blocks, she got into her rhythm, she then just stumbled and her leg collapsed a little bit. She had a hell of a lot of work to do to bring that back, but she did it.

She absolutely put on the burners to secure that qualification position, but she wouldn't have wanted to run it in that way. She will have to go away and make sure her start is bang on for the final.

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

That was good wasn't it! We knew this semi-final heat was going to be tight, but Melissa Jefferson-Wooden is just immense. Her season has been so strong.

What I love about her is not just her consistency, because that's clear, but her metronome way of running. It's all about rhythm and timing for her. She runs effortlessly because it is just one thing after the other for her - get a good start, go to my transition, get into my knee lift and just maintain.

Dina Asher-Smith will be very happy to see the 'Q' next to her name.