GB quartet win 4x400m mixed relay silver in dramatic final
Netherlands set to win gold before Femke Bol falls yards from the line
Ethiopia's Gudaf Tsegay wins 10,000m gold after Dutch athlete Sifan Hassan falls while leading sprint finish
Katarina Johnson-Thompson wins 200m heat to move into second after day one of heptathlon
Great Britain's Zharnel Hughes (10:00) and Eugene Amo-Dadzie (10:09) win 100m heats, Reece Prescod also makes Sunday's semi-finals
GB's Josh Kerr, Neil Gourley & Elliot Giles through to 1500m semi-finals
American world record holder Ryan Crouser retains men's shot put title
Women's 10,000m final
This final should take about 30 minutes, give or take, although they have started very leisurely.
Sifan Hassan has already raced around this track once today, of course, in the 1500m this morning.
She's right at the back as the race gets going.
Image source, Getty ImagesNext up is the first track final - the women's 10,000m.
The cameras are following the remarkable Sifan Hassan, winner of the London Marathon earlier this year, who is going for an incredible 1500m, 5000m, 10000m treble here.
This race includes three of the four fastest runners in history - world record holder and reigning champion Letesenbet Gidey of Ethiopia, compatriot Gudaf Tsegay and Hassan, who ran in the 1500m heats this morning.
Jessica Warner-Judd competes for Britain.
Harry Poole
BBC Sport in Budapest
Katarina Johnson-Thompson needed a big performance - and she delivered!
The legs started to go as the lactic struck towards the finish line but she holds off Anna Hall to leap in to second place overall.
The former world champion receives a nice big hug from leader Hall, who now sits within 93 points heading in to tomorrow's finale.
Get a good rest, Katarina, there's a medal to be won!
Heptathlon 200m
And that means Katarina Johnson-Thompson leaps up into second in the overall standings at the end of the first day of heptathlon action.
Anna Hall still holds a sizeable lead but KJT is right in the mix.
Heptathlon 200m
Johnson-Thompson is staring up at the big screen. She wants to see the time.
She beat big favourite Anna Hall into second and left the others ahead of her in the overall standings a long way behind.
Heptathlon 200m
That's more like the Katarina Johnson-Thompson of old!
World Athletics Championships 2023: GB's Katarina Johnson-Thompson wins 200m heat
Heptathlon 200m
KJT gets out well...
Heptathlon 200m
KJT is in lane six with leader Anna Hall two outside of her.
Johnson-Thompson does have the better personal best but Hall has a better time this season.
Heptathlon 200m
Right then.
Katarina Johnson-Thompson is on the start line for this 200m, alongside the three Americans who sit first, second and third in the overall standings.
Men's shot put final
In the middle of this impressive stadium, the men's shot put final is under way and Olympic champion and world record holder Ryan Crouser starts with a big throw of 22.63m.
His prep has been hampered by being diagnosed with blood clots in his leg in the run up to these world championships.
It doesn't seem to be impacting him...
Dame Jessica Ennis-Hill
London 2012 Olympic heptathlon champion on BBC TV
In the high jump, I expected to see a little bit more from Anna Hall. She didn't get into the 90s. We can't expect her to PB every time.
Denise Lewis
Olympic heptathlon gold medallist on BBC TV
World Athletics Championships 2023: Zharnel Hughes in next round with fellow GB sprinters
Zharnel Hughes is so pre-occupied with the start, he didn't want to take any chances. His confidence is so high, he knew he had what it takes to bring it home.
Heptathlon 200m
Katarina Johnson-Thompson will be in the third and final heat, along with the others at the top of the overall leaderboard.
On paper at least Johnson-Thompson is the quickest over 200m so this could be a chance to gain back some ground.
Image source, Getty ImagesMen's 100m heats
2019 world champion Christian Coleman makes it through in the seventh and final men's 100m heat.
The American certainly made a lightning fast before winding down.
All of the big names are through, including Britain's Zharnel Hughes...
World Athletics Championships 2023: Zharnel Hughes in next round with fellow GB sprinters
Harry Poole
BBC Sport in Budapest
Marcell Jacobs' fitness was a complete unknown coming in to this.
Having managed to race just once in an injury hampered season, finishing seventh at the Paris Diamond League back in early June, he would appear to be in no shape to challenge for a medal.
But he takes the third automatic qualification spot after receiving a warm reception and, with that, the Olympic champion has arrived. A shock victor in Tokyo, you just can't rule him out...
Image source, Getty ImagesMen's 100m heat
Olympic champion Marcell Jacobs scrapes through!
The Italian, a surprise winner in Tokyo in 2021, looked out of it halfway down but he has just managed to get his nose across the line in third.
Not convincing by any means.
Men's 100m heats
How good was this from the man dubbed the world's fastest accountant?!
World Athletics Championships 2023: Eugene Amo-Dadzie wins 100m heat to qualify on debut
Men's 100m heats
Finally they get away in this fifth men's 100m heat...
American defending champion Fred Kerley starts well but Jamaican Oblique Seville comes flying through to win in a rapid time of 9.86 seconds.
That's a personal best and the third quickest time this year!
Men's 100m heats
Another false start!
There's no obvious culprit this time.