Summary

  • South Africa's Van Niekerk wins 400m in 43.48 seconds

  • Gatlin (19.87) & Bolt (19.96) win their 200m semis

  • GB's Zharnel Hughes wins his semi in 20.14

  • Eilidh Child sixth in 400m hurdles final

  • Dina Asher-Smith fastest qualifier in 200m heats

Live Reporting

Aimee Lewis

  1. Blimey. What a fantastic end to an entertaining day of track and field. Usain Bolt and Justin Gatlin have ensured there'll be another headline-making showdown on Thursday in the 200m. Three men dipped under 44 seconds in the same 400m race for the first time in history, the exhausted victor carried away on a stretcher, while Kenya have their first javelin world champion. 

    We will be back tomorrow to guide you through another day. But until then why not check out CBBC's latest quiz, titled 'Could Rutherford jump...' or read our day-by-day coverage guide - or our medal table and results page... I could go on...Bye for now. 

  2. Questions for Michael Johnson?

    We're coming to the end of our coverage but before we go it's worth mentioning that Michael Johnson will be on BBC Radio 5 live on Thursday evening, between 20:10 and 21:00 BST. 

    If you've got any questions for the 400m world record holder, Thursday night could be the night for answers.

  3. Getting ready for day six...

  4. Niekerk update

    Phil Jones
    BBC Sport athletics reporter

    "Van Niekerk was going to go off in an ambulance but the ambulance has gone and he has stayed and is still receiving medical treatment in the stadium. I am not sure what the attention is he is receiving but it is more encouraging news."

  5. Van Niekerk still receiving treatment

    The latest on Wayde Van Niekerk is that the South African is a-ok, though he is still receiving medical treatment. 

  6. 'There won't be another YouTube athlete'

    Very few athletes have done what I have done. There will not be another YouTube athlete coming through. I want to go back and watch my throw, it was almost perfect.

    Kenya's Julius Yego, javelin gold medallist

    Julius YegoGetty Images

  7. 'To throw like this is unbelievable'

    Was Wayde Van Niekerk's 400m gold the performance of the day or did Julius Yego steal the show by winning Kenya's first gold in the field? 

    It was unbelievable, I am happy I won a gold medal for Kenya. I have been training hard for this championships. After Birmingham I had a serious injury and thought I would not be competing so to throw big like this is unbelievable.

    Kenya's Julius Yego, javelin gold medallist

  8. 'Van Niekerk gave everything'

    Michael Johnson
    400m world record holder on BBC TV

    Van Niekerk was taken out of his comfort zone. Merritt stretched him, but he gave everything he had, he was able to hold form and get to the finish line. 

  9. Go hard, and go home on a stretcher

    What do you have to do to become a world champion? Push yourself when the legs are screaming no, go quicker than you've ever run before, take your body to places its never been. 

    You won't have the energy for a victory lap, mind, and stepping on that podium the next day is going to paaaain-ful. 

    Wayde van NiekerkGetty Images

  11. 'We are warriors'

    l ran a personal best, I ran well but not good enough for the gold. I can't complain, I got a silver and go home with some hardware. The 400m is never easy. We are warriors and rise to the occasion.

    LaShawn Merritt, men's 400m silver medalist

    LaShawn MerrittAFP

  12. National record not enough for a medal

    Domanica's Luguelin Santos broke a national record, clocking 44.11, but that was only good enough for fourth.

  13. It was a special race - James

    It was a special occasion, a once-in-a-lifetime race and I am glad to be part of a special group of 400m runners in this era.

    Kirani James, who won bronze in the men's 400m final

    Kirani JamesGetty Images

  14. 'I will come back stronger'

    There were a lot of fireworks in the final. I tried to come out and put in a decent performance but it was just beyond my reach. I will take that, go home and come back and cause some problems. It is quite an achievement for me to come here and make the final and run 44 seconds back to back, but I will come back stronger.

    Britain's Rabah Yousif, who came sixth in men's 400m final

    Rabah YousifPA

  15. Setting a new standard

  16. A historic 400m race

  17. Stretcher for Van Niekerk

    Britain's Rabah Yousif was sixth in 44.68. 

    An incredibly quick race and Wayde van Niekerk's legs have given away. There'll be no lap of honour for the South African as the medical team come to take him away on a stretcher. Exhausted and elated in equal measure. 

    Van NiekerkAFP

  18. 'So much pain for Van Niekerk'

    Darren Campbell
    Former British sprinter on BBC Radio 5 live

    Van Niekerk can't celebrate, he's holding on to the barrier for support, and he's down again. He's in so much pain. He's not thinking about a lap of honour. That's how hard it was.

  19. 'What a run by Van Niekerk'

    Allison Curbishley
    BBC athletics expert on Radio 5 live

    That's how you run a 400m! He screamed out of the blocks and put so much air between Kirani James and himself that he gave James no chance of thinking he could close the gap. That was painful, he will be crying lactic, he can't even stand up.

    Wayde Van NiekerkAFP

  20. 'Stunning win for Van Niekerk'

    Steve Cram
    BBC athletics commentator

    A stunning performance from Van Niekerk. Who could have predicted he would run a 43.48 seconds, that puts him fourth on the world all-time list. Merritt and James could not catch him, a brilliant win and a brilliant time to beat a brilliant field.