Well that was another action-packed session at the World Athletics Championships!

Great Britain got a first medal of these championships, though it felt a little bitter-sweet.

Jake Wightman pulled away in the men's 1500m after Josh Kerr fell behind with an injury, but was pipped to gold by Isaac Nader and took silver.

Other highlights include:

• Katie Moon retained her world title in the women's pole vault final after Sandi Morris pushed her all the way
• 20-year-old Italian Mattia Furlani took a surprise gold medal in the men's long jump
• Olympic bronze medallist Faith Cherotich took gold in the women's 3,000m steeplechase, as Olympic champion Peruth Chemutai fell
• Great Britain's Tyri Donovan narrowly missed out on a place in the men's 400m hurdles final

Thanks so much for joining us today. We'll catch you tomorrow as GB's Amber Anning goes for gold in the women's 400m final, plus we'll have build-up and updates from the finals of the men's javelin throw, the women's triple jump, and the men's 400m.

Cheers!

Image source, Getty Images

Great Britain's Josh Kerr was favourite to retain his 1500m world title, but he pulled up midway through the race with what appeared to be a leg injury.

He fell behind the pack but carried on running.

Image source, Getty Images

2022 world champion Jake Wightman led with less than a lap to go...

Image source, Shutterstock

But was pipped on the line by Portugal's Isaac Nader, who couldn't quite believe he was the new world champion.

Image source, Getty Images

After hobbling around the track and finishing 37 seconds behind the winner, Josh Kerr made sure to congratulate British team-mate Jake Wightman.

Image source, Getty Images

Jake Wightman wanted gold, but he was still very happy with silver after what has been a tough couple of years for him.

John Caffeine on X: Well at least we have a medal now! Great effort from Wightman.

What a day for Jake Wightman!

Image source, Getty Images

Image source, Getty Images

Image source, Getty Images

Earlier, favourite Karsten Warholm advanced in the men's 400m hurdles.

The Norwegian only placed second in his semi-final, finishing behind Abderrahman Samba of Qatar.

The final takes place on Friday.

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

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It is heart-breaking to watch Josh Kerr pull up like that.

To get back-to-back world titles, you also need to have a little bit of luck on your side. Everything has to align and come together.

It is devastating for it to end this way.

Image source, Getty Images

1500m silver medallist Jake Wightman of Great Britain speaking to BBC Sport: "I knew I still had something in me. I knew I was gong to run to try and win today and whatever happened, I would be happy.

"When you get that close you cannot help but think what if I had done more? But I left everything out there.

"It has been a few bleak years so making this team was the main thing.

"I have made some big changes in my life this year. Getting a new coach and moving to Manchester. I hoped they were for the best and now that the big stage is here, I stepped up.

"I want to thank my coaching team and my Dad. It will be awhile to process this.

"I believe that you get what you pay for in the end. I am so happy that all the persistence has been worth it.

"I felt like I had another gear all these Championships but I did not know what would happen. This silver is a gold for me and I am so relieved."

World champion Neeraj Chopra and Olympic champion Arshad Nadeem progressed to Thursday's men's javelin final with minimal fuss, as does Germany's Julian Weber.

There's a bit of a shock though as Brazil's Luiz da Silva fails to make the cut after enjoying an impressive season.

Two-time world champion Anderson Peters of Grenada tops the rankings and will take confidence into the final.

Here it is then.

Josh Kerr pulling up, Jake Wightman pulling up on the line, outsider Isaac Nader taking the win - it was all going on.

Watch it once. Watch it twice. Watch it three times.

Jeanette Kwakye
Former British 100m champion on BBC One

We've just heard that Josh Kerr was unable to walk up the steps to do the TV interviews.

Greg Rutherford
Former world and Olympic long jump champion

Image source, Getty Images

Everybody suffers with injuries in their careers. Jake Wightman shows that you can come back from it and the good guys do still win medals.

For anybody young watching this suffering with something difficult, it shows that you can push through.

Alan C. Smith on X: Soo so close. Great race for Jake though. Josh looked wrong as soon as he headed straight for the inside at the start.

Great Britain's Neil Gourley speaking to BBC Sport after finishing tenth in the 1500m final: "That was a really tough field to be in. I had bigger goals in it.

"I wasn't in a terrible spot with 300 metres to go. Normally I can change gears but today I felt tired. I just did not have it.

"I have exceeded expectations and had my best form when it counted. Given where I was a few weeks ago, I am proud of where I have ended up."

Steve Cram
BBC Sport athletics commentator

Image source, Getty Images

It felt like Josh Kerr was not in the right place all along. Did he have an injury beforehand that he was hiding?

There is no way that it was his game plan to be in the position he was.

Jake Wightman is pipped on the line!

Isaac Nader storms through on the outside and wins gold!

Great Britain's Wightman takes a lead on the final lap from Laros and Kenya's Timothy and Reynold Cheruiyot and looks well set as the runners come onto the final straight.

But Nader gets round on the outside line and beats Wightman by two hundredths of a second with a time of 3:34.10, with Reynold Cheruiyot third.

Neil Gourley finishes 10th with 3:35.56, while Josh Kerr hobbles over the line last in 4:11.23, over 30 seconds behind the rest of the field.

Image source, PA

Steve Cram
BBC Sport athletics commentator

Kerr needs to stop. Nothing good can come from this now.

He is trying to keep running but is not even moving properly.

Josh Kerr is hobbling!

He has been tripped or pulled up? He's out of contention but still hobbling along at the back as we head into the final lap.

Timothy Cheruiyot now leads, ahead of Niels Laros of the Netherlands.

Jake Wightman is well set in fourth.

Through the first 300m - Niels Laros of the Netherlands leads us out.

Josh Kerr heads for the inside line, tucking in the mid-pack.

Harry Poole
BBC Sport in Tokyo

Here we go then.

Fourteen athletes. Three medals. Three Brits. A chaotic three-and-a-half minutes ahead.

The past three champions are in the running for another 1500m gold, and two of them are wearing GB vests.

They run out on to the track to huge cheers, just as Mattia Furlani is wrapping up long jump gold. And so, to the final event of the night...