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

That was very hard work for Matthew Hudson-Smith. He looked really out of sorts.

Our expectations are through the roof for the Olympic silver medallist, but he looked very tired coming down that home straight. He just couldn't gain on people.

While everybody else was charging, Hudson-Smith seemed like he was faltering a little bit. He went off so quickly, as he normally does, but there's always a lot on the line at a World Championships.

If Jacory Patterson wasn't already the favourite for gold, he is now!

The American sets a new national record with a time of 43.9 seconds, with Jamaica's Rusheen McDonald second and Italy's Edoardo Scotti third.

The start of the race was a bit of a mess - Nigeria's Samuel Ogazi looked like he thought there was a false start, and he never recovered from a sluggish start.

Botswana's Busang Collen Kebinatshipi finishes fourth, and his time of 44.48 means he overtakes Britain's Matthew Hudson-Smith as the fastest non-automatic qualifier.

Image source, Getty Images

Image source, Getty Images

Great Britain's Charlie Dobson has been speaking to BBC Sport after reaching the men's 400m semi-final: "I don't think it was my sharpest race but, at the end of the day, I secured a position in the top three. I saw I was in that position and just relaxed a bit down the home straight to save a bit in the tank for two days time.

"That 200m to 300m period is something that I've worked on a lot this season. I don't think I've actually got it right once yet in a race, but it's all for nothing in the semi-finals so we'll see what happens.

"I still feel like I'm learning, but unfortunately that's not an excuse here so I'll make sure to give it everything again in the semi-final."

Image source, Getty Images

Matthew Hudson-Smith is in trouble!

Great Britain's Olympic silver medallist seems to struggle in the final straight after a strong start and comes home in fourth in heat two, one place out of the automatic qualification places.

He spends some time lying on his back post-race, and will now wait to see if his time of 44.68 makes him one of the six fastest non-automatic qualifiers.

Botswana's Bayapo Ndori takes the heat with 44.36, finishing ahead of Japan's Yuki Joseph Nakajima, setting a national record of 44.44, and Jamaica's Bovel McPherson, who set a personal best of 44.51 after flying out of the gate in the outside lane.

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

Lots of the runners looked like they were in cruise-mode there. I must admit the race looked a lot slower than the final time that was given, which was 44.64.

What played into Charlie Dobson's hands was the fact he had Jereem Richards, who is an experienced runner, on the outside. Dobson will have known that if he just tracked Richards all the way through, it would be enough.

We've had a short delay before the start of heat two of the men's 400m, as the judges try to sort themselves out with the high jump heats getting under way. Bit of multi-tasking going on.

Image source, Getty Images

Charlie Dobson takes third place in heat one to progress to the semi-finals, although he was made to work hard for it around the bend.

Jereem Richards of Trinidad and Tobago takes first place, with Lythe Pillay of South Africa second.

Image source, Getty Images

There are plenty of other athletes worth keeping an eye on in the men's 400 metre heats

Until June, Jacory Patterson of the United States was combining training with working night shifts at a UPS distribution centre. The now full-time athlete is the second fastest 400m runner in the world this year, after setting a PB of 43.85 seconds.

Commonwealth Games champion Muzala Samukonga won bronze at Paris 2024, becoming the the first Zambian in 28 years to win an Olympic medal in any sport. The 22-year-old is yet to hit top form this year, finishing outside the top three in six of his seven races in 2025.

Zakithi Nene is the fasted 400m runner of 2025, winning by over a second in a meeting in Nairobi in May in 43.76 to place him 16th on the all-time list.

33-year-old Kirani James has a full set of Olympic and World Championship medals, and was back-to-back global champion in 2011 and 2012. He's not in great form - James is only the 19th quickest 400m runner in 2025.

Great Britain's Jake Wightman has been speaking to BBC Sport after winning his men's 1500m heat: "I didn't really want to win my heat. I tried to go into this thinking that I would just get in the top three, but it was messy and I could hear the bodies falling so I just wanted to stay out of that.

"I knew that if I felt good, I could control the last 200m which I felt like I did. It felt really nice to be out there. It was exactly what I needed today."

Image source, Getty Images

First up in today's evening session is the men's 400 metre heats.

Olympic champion Quincy Hall is absent through injury, so Great Britain's Charlie Dobson, Matt Hudson-Smith and Samuel Reardon will be looking to take advantage.

Hudson-Smith narrowly missed out on gold at Paris 2024 and at the 2023 World Championships in Budapest two years ago. Having overcome battles with mental health to get to this point - and he recently became a father - he'll be desperate to get his hands on the top prize.

Dobson is the current British champion and earned a surprise win over Hudson-Smith at July's London Diamond League meet, while Reardon will hope to use the momentum of setting a new PB of 44.60 seconds.

The top three from each heat will progress to the semi-finals, along with the six fastest non-automatic qualifiers.

Harry Poole
BBC Sport in Tokyo

Yesterday was a significant day for hosts Japan, who celebrated the return of a premier global sporting event to Tokyo with a medal in the opening men's 35km race walk.

Four years after the Japanese capital hosted the postponed 2020 Olympics behind closed doors because of the coronavirus pandemic, the National Stadium's entrances were opened to fans for the start of the World Athletics Championships.

Memories of the 2020 Games are scattered all around the stadium which was supposed to stage magical moments for Japan, including the Olympic cauldron.

The president of Japan Athletics spoke about the opportunity for these World Championships to wipe away the mixed emotions felt back then and, on the evidence of last night's atmosphere and with another sold-out session to come, that flame feels like it has been reignited.

BBC iPlayer

Five world champions are set to be crowned in the evening session, so we'll make sure you don't miss any of the action.

You can also tune into BBC Two from 10:00 BST before coverage switches to BBC One at 12:15 BST, with both shows also available to stream live on BBC iPlayer.

If you do miss any of the key moments, the daily highlights show will be available to watch on BBC Three, iPlayer and Red Button from 19:00 BST.

Jenny Meadows
Former 800m World Championship medallist on BBC Two

Great Britain can definitely claim Julia Paternain's gold medal. It was really nice to see her talk about her coaches afterwards, they will all be celebrating her brilliant medal. We talk about the highs and the lows, but that was a fairy tale for her.

It was only her second-ever marathon and she ran a nine-second personal best.

Image source, Getty Images

Harry Poole
BBC Sport in Tokyo

Dressed for the part and delivering a top class service, volunteers have been out and about helping fans keep cool by spraying mist as the heat and humidity remains pretty darn intense in Tokyo.

There are plenty of options available to help spectators cope with the conditions outside the stadium, including this walkthrough cooling area which, let me tell you, was very refreshing. Momentarily, at least.

Organisers have done what they can to help provide temporary relief from the temperatures, which have remained consistently around 30C and are only expected to increase over the coming days.

It really is tough out there for the athletes. I'm not sure how else to explain it other than it feels like the air is just sticking to you.

Thankfully the women's marathon played out without any major incidents this morning following the carnage we saw after the race walks on Saturday.

Image source, Getty Images

It was certainly an eventual overnight session!

Tokyo 2020 1500m gold medalist Jakob Ingebrigtsen suffered a shock exit as he finished eighth in his heat.

The two-time Olympic and world champion - who described his performance as "terrible" - has endured an injury-disrupted season and did not race for six months prior to these championships.

Ingebrigtsen will now focus on defending his 5000m title.

Also during Sunday's morning session, Kenya's Peres Jepchirchir outsprinted Ethiopian Tigst Assefa in a thrilling conclusion to the women's marathon.

Julia Paternain, a former English schools champion during her upbringing in the UK, placed third to win Uruguay's first ever world championship medal.

However, she did not initially realise her achievement following 26.2 miles in draining conditions, as high temperatures and intense humidity continued in Tokyo to pose challenges for the athletes.

There was plenty of action overnight in the morning session, including a big shock. Let's recap what happened.

There's another busy evening session in store on day two of the 2025 World Athletics Championships.

Let's take a look at what's coming up over the next few hours:

10:35 - Men's 400m heats

10:40 - Men's high jump qualifiers

11:12 - Women's discus final

11:25 - Women's 400m heats

12:20 - Women's 100m semi-final

12:40 - Women's long jump final

12:45 - Men's 100m semi-final

13:07 - Women's 1500m semi-final

13:30 - Men's 10,000m final

14:13 - Women's 100m final

14:20 - Men's 100m final

Image source, Getty Images

Hello (!) and welcome to day two of the World Athletics Championships in Tokyo, Japan.

After an entertaining day one and a dramatic overnight session to begin day two, there's plenty more to look forward to.

We've got five finals coming up, including the finals of the men's and women's 100 metres.

Let's get stuck in.