Natalia Bukowiecka has done all she can for a world medal on home soil.

The Pole sets a national record of 50.83 seconds to win the first final. That is the target for the next four runners.

Back on the track for the women's 400m final. As with the men's, it is split in two.

Natalia Bukowiecka is the home hope for Poland, and goes in final one.

Karalis... just knocks the bar! He will have two more goes at 6.20m.

Duplantis allows himself a little smile.

Emmanouil Karalis skips 6.15m. In response, Mondo Duplantis forgoes 6.20m!

So the Greek goes at 6.20m - as Zorba The Greek plays around the arena.

Up we go to 6.15m.

Mondo Duplantis clears, then pumps his fist to the crowd. He is being properly challenged by Emmanouil Karalis tonight but is rising to the occasion.

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

It doesn't surprise me that once Jonielle Smith put her foot down, and everything was nice and accurate, she could accelerate beautifully.

She got into the lovely running style that she has, which is very similar to Elaine Thompson-Herah.

She is relishing the fact that she is up against these top-racing women and they don't know what she is capable of doing.

That's the end of Amy Hunt's championship.

Jamaica's Jonielle Smith wins in 7.03 seconds, while Luxembourg's Patrizia van der Weken takes the second in 7.05 and takes the other automatic qualification spot.

Ewa Swoboda's 7.08 knocks out Hunt (7.10) and she goes through to the final at 20:20 GMT.

The final will feature Dina Asher-Smith, who was the second-fastest in these semi-finals behind Zaynab Dosso of Italy.

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We're lining up for the third semi-final.

Home athlete Ewa Swoboda is the only athlete in the field with a personal best below seven seconds - she finished in 6.98 winning world silver in Glasgow two years ago.

She looks a little coy as the crowd cheer her name.

Steve Backley
Two-time world and Olympic javelin silver medallist on BBC Two

That's a good performance from Kurtis Marschall. He will be pleased with that!

The Australian has shown optimism for higher heights in the future tonight.

Norway's Sondre Guttormsen fails his third effort at 6.05m and finishes fourth.

Australia's Kurtis Marschall also fails at that height, but on count back nudges above Guttormsen to take bronze.

It is Mondo Duplantis v Emmanouil Karalis for gold.

And the mind games are in full force, as Karalis passes 6.10m.

Over to you, Mondo... he clears it with room to spare.

After two of six attempts, Cuba's Leyanis Perez Hernandez - world champion indoors and outdoors - leads the women's triple jump with a best mark of 14.95m.

Great Britain's Georgina Forde-Wells has fouled her first two jumps so has work to do.

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

There's no surprises from that second semi-final at all!

We expected both Zaynab Dosso and Dina Asher-Smith to go through.

A great run by Dina Asher-Smith, through to the final later this evening in a time of 7.03 seconds.

Asher-Smith turned 30 in December but that was a vintage run.

Italy's Zaynab Dosso won the semi with Asher-Smith second. The third place runner finished in 7.14secs, so Amy Hunt is holding on to her qualification place for now.

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Dina Asher-Smith is on her marks...

There are just four vaulters left, going for 6.05m.

Emmanouil Karalis has cleared it, Kurtis Marschal and Sondre Guttormsen have both failed twice.

Mondo Duplantis has skipped it and will next go at 6.10m.

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

Julien Alfred just got a little bit tight at the start there. She just didn't allow herself to go through the phases correctly and at the right times.

She even dipped at the wrong time as well, having hit the line at the wrong pace.

None of the athletes will say they ran that perfectly, but I believe they will be a little more relaxed in the final.

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Amy Hunt was badly left in her blocks in her semi-final, she got away very slowly.

In truth she did well to snatch fourth after a poor start.

So, Amy Hunt needs none of the runners in the next two semis - outside the top two finishers - to go slower than 7.10 seconds. It is out of her hands.

The second semi-final will feature Hunt's GB team mate Dina Asher-Smith.

Amy Hunt comes home fourth!

Olympic 100m winner Julien Alfred of St Lucia takes the semi-final in 7.04 seconds, with Jacious Sears of the United States second with the same time.

They're the automatic qualifiers while Jamaican Brianna Lyston (7.05) and Hunt (7.10) get to sit on the beanbags and wait to see if they can come through as the fastest non-automatic qualifiers.

That might be a bit of an ask for the British athlete with two semi-finals to come.

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Steve Cram
1983 1500m champion on BBC Two

Amy Hunt is going to have to go some here. This is a tough semi-final.

All of the athletes are quick at these championships, but there are some very fast women alongside her right now.