Kenya's Kipyegon wins 1500m, GB's Muir in fourth and Weightman sixth
Jamaica's Omar McLeod wins men's 110m hurdles
Venezuela's Yulimar Rojas wins women's triple jump
Poland's Wlodarczyk wins hammer, GB's Hitchon seventh
Three GB men through to 200m semi-finals
Allison Curbishley
BBC athletics expert on Radio 5 live
"That was such a clean race from Omar McLeod. He had the pressure on him. Not a fairytale ending for Aries Merritt. Look at the relief on Omar McLeod's face. He's gone to the Jamaican fans."
Mike Costello adds: "I think he just hugged a lady and said 'mummy'."
Men's 110m hurdles final
Balazs Baji is a surprise medallist in third and he's absolutely delighted with that. Rightly so!
Men's 110m hurdles final
Image source, Getty ImagesOmar McLeod is the Olympic and World champion as he wins in 13.04 seconds.
Sergey Shubenkov, defending champion, is second as a neutral athlete as Balazs Baji takes bronze.
Mike Costello
BBC Radio 5 live athletics commentator
Just the lift that the Jamaican team needed. The Olympic champion is world champion.
Men's 110m hurdles final
Garfield Darien of France lets out a roar as the athletes get in their blocks, all set? Go!
Away first time and it's Omar McLeod piling away - he wins it!
Omar McLeod wins 110m hurdles final
Mike Costello
BBC Radio 5 live athletics commentator
Image source, Getty ImagesIn the final two years ago, McLeod finished sixth. But he won in Rio and his improved. He starts favourite. He is the only man to run under 13 seconds this year.
How the Jamaican team need a lift here...
Men's 110m hurdles final
Aries Merritt paces in his blocks, staring down his lane. He won the Olympics on this very track five years ago...
Men's 110m hurdles final
How fast will Omar McLeod go tonight? I'm saying 12.95...
Image source, ReutersMen's 110m hurdles final
Women's 400m semis
How not to pace a semi-final by Quanera Hayes...
US Champion Hayes 'asleep on the back straight' finishes 3rd in 400m semi.
Tom Fordyce
Chief sports writer at London Stadium
If you're wondering why Olympic champion Omar McLeod will be running the 110m hurdles with a set of beads in his mouth, they belonged to his late aunt Fiona. "It reminds me that my aunt is watching over me and will forever be proud of me," says the 23-year-old Jamaican.
Men's 110m hurdles final (21:30 BST)
If you grew up on Colin Jackson and Tony Jarrett then this event will be special.
We could see a fast time. And reigning champion Sergey Shubenkov from Russia could win the authorised neutral team’s first medal.
Women's triple-jump
Yulimar Rojas (pictured) improves her mark in the women's triple jump and the Venezuelan had some room on the take-off board. It's a 14.83m leap and that's her advantage fractionally improved.
Next up is Caterine Ibarguen and she rubbishes what has gone before, nailing a 14.89m effort. A qualified nurse, Ibarguen won Colombia's first ever Olympic gold medal in track and field in Rio.
Image source, Getty ImagesMen's 110m hurdles final (21:30 BST)
Image source, AFP/Getty ImagesOmar McLeod has been flying, and the Jamaican has talked of breaking the world record this year – could he do it in tonight's final? He'd have to shave a tenth of a second off his best. A big ask.
The man who holds that mark of 12.80 seconds is America’s London 2012 champion Aries Merritt.
Merritt has not run under 13 seconds this season and has not really got close to his 2012 form of late.
Image source, Getty ImagesEver wondered what the final moments before a race are like - specifically waiting in the call room? Luckily 2011 world 400m hurdles champion Dai Greene has written a revealing blog on the subject., external
He tells us about one athlete waxing his hair in the call room - that ended badly - and goes into some good detail on how Americans handle it.
"Plenty of times I’ve been in races with more than one American," writes Greene. "On occasions they could be quite vocal, acting like each other’s hype man, trying to feed off one another. Telling themselves loudly that its “our time” and so on. I didn’t find that intimidating but I’m sure others would have. If you have to say it out loud then you’re probably just trying to persuade yourself to believe it."
Allison Curbishley
BBC athletics expert on Radio 5 live
It was a personal best, 51.81. That's all you can ask from Zoey Clark as she competes in a major championships for the first time.
Listen to Allison and the 5 live team now. Click 'BBC Coverage' in this live page.
Women's 400m semis
American Phyllis Francis was fifth in Rio and easily has the best time on paper in this heat. She sets off hard.
Zoey Clark is left behind as Francis and Kabange Mupopo push on. Francis wins in 50.37, Mupopo second.
Clark is seventh in 51.81 - a new personal best. You can't ask for more than that.
PB for Francis as she wins 400m semi
Michael Johnson
Four-time Olympic gold medallist athlete on BBC TV
That was absolutely astonishing from the 18-year-old Salwa Eid Nasser.
She ran a very good race. Nice technique, strong and was able to hold that speed down the home straight.
Felix was having to kick again in the final few metres - that would have been tough.
Women's 400m semis
Zoey Clark of Britain is in the third semi-final. Her PB is 51.84 - she's going to have to take a second off that to qualify.
Women's 400m semis
And that fast second semi means that Quanera Hayes, who was second fastest on the world list this year, is out.