Van Niekerk sets 400m world recordpublished at 02:19 British Summer Time 15 August 2016
Athletics
Wayde van Niekerk runs 43.03 in the 400m to win gold and break Michael Johnson's 17 year old world record.
Usain Bolt wins 100m gold in 9.81 seconds for his seventh Olympic title
Van Niekerk breaks Johnson's 400m world record to win gold in 43.03
Great Britain on 15 golds after winning five on Sunday
Murray retains his tennis title; Rose wins golf gold
Cycling: GB's Kenny wins sprint gold and his fifth gold in all
Whitlock wins GB's first gymnastics golds
Silvers for Dempsey (windsurfing), Smith (gymnastics) and Skinner (cycling)
Tom Rostance
Athletics
Wayde van Niekerk runs 43.03 in the 400m to win gold and break Michael Johnson's 17 year old world record.
Men's 400m
Bronze medallist LaShawn Merritt: "It was a crazy race, a great moment in history. The world record was broken, the best man won."
Wayde van Niekerk sets new 400m world record and wins gold
Michael Johnson
Four-time Olympic gold medallist athlete on BBC One
BBC pundit Michael Johnson has just watched Wayde van Niekerk smash his 400m world record, with the South African winning gold in a time of 43.03 seconds.
That was some style to break the world record. Just like watching Usain Bolt break the (200m) world record (in 2009), being a fan of the sport, it is incredible to watch.
I will be OK and life will go on, but Wayde van Niekerk will wake up tomorrow knowing he has done it, and I know that feeling. He was under a tremendous amount of pressure and it was always going to take a fast time.
Now he will be trying to get under 43 seconds and that will be tough. He will always go in with a target on his back now. People asked me how long they thought my record would last and you never know. It is always a joy to see a world record broken.
Wayde van Niekerk 400m world record
There's still time yet Tom...
Women's heptathlon
Jessica Ennis-Hill has her face glazed with tears as she collects her heptathlon silver.
Men's 400m
The 42-second 400m. Coming soon...
Ryan Evans: Prior to that, Wayde Van Niekerk's personal best was 43.48. He's just smashed that by 0.45! Huge.
M Vallely: Regardless of what happens in the 100m that was worth staying up for! Congrats to Wade Van Niekerk!!
Sully: I'm stunned . Saw every Michael Johnsons race & records. There was no one like Michael Johnson.
There is now Sully, there is now.
Men's 100m final at 02:25 BST
Men's 100m final (02:25 BST)
Usain Bolt is fast - but only for a human.
It turns out he can barely outpace a monkey. I mean, come on. Raise your game.
And while we're at it, the anaconda is a disgrace. Left for dead by a restricted motability scooter.
Pathetic.
Wayde van Niekerk world record
Darren Campbell
Former British sprinter on BBC Radio 5 live
Tomorrow's headlines should all be about Usain Bolt winning the 100m, starting this treble treble.
But how can it not be Wayde van Niekerk beating the great Michael Johnson's 400m world record?
Van Niekerk breaks 400m world record
Catch him if you can...
Wayde van Niekerk wins 400m
Denise Lewis
Olympic heptathlon gold medallist on BBC One
I never thought that world record (43.19) would get broken.
Even Usain Bolt said Wayde van Niekerk was seriously quick. What an incredible night.
Usain Bolt is being overshadowed! Almost.
Mind you, that 100m record has stood for a while. Over to you Usain!
Men's 100m (02:25 BST)
The awkward truth - for many - tonight is that Justin Gatlin is perhaps favourite to end Usain Bolt's eight-year reign as Olympic 100m champ.
The 34-year-old is the fastest man in the world this year (9.80), while Bolt has struggled for fitness and form.
Why the awkwardness? Well Gatlin is a two-time doper who served a four-year ban.
Mind you, he was favourite to win in Beijing during last year's World Championships, but Bolt ended his 28-race unbeaten run to take gold in 9.79 seconds.
Bolt told French newspaper Le Parisien that Gatlin "holds no fear for me" and that athletics, mired in a major drugs scandal, needs him to beat a rival snared twice for doping.
No pressure then...
Wayde van Niekerk world record
Darren Campbell
Former British sprinter on BBC Radio 5 live
You know something special is happening when Kirani James is five metres behind, and LaShawn Merritt is right there with him.
You thought he had to blow up, but he just kept coming.
Wayde van Niekerk sets 400m world record and wins gold
Michael Johnson
Four-time Olympic gold medallist athlete on BBC One
Oh my God! From lane eight, a world record. He took it out so quick. I have never seen anything from 200 to 400 like that.
He may well have run faster in the second 200, than in the first. Well done to this youngster. A world record. That was a massacre from Wayde van Niekerk. He just put those guys away. LaShawn Merritt was shaking his head, thinking 'I can't do anything with that'.
Van Niekerk is so young, what else can he do? Can he go under 43 seconds? It is something I thought I could do, but never did. Usain Bolt will be retiring soon, this could be the next star of the sport.
A true great Olympic track and field moment. That will stick in the mind for years.
Michael Johnson's world record of 43.18 had stood since 1999...
Men's 400m
Denise Lewis
Olympic heptathlon gold medallist on BBC TV
Not since 1924 and the great Eric Liddell has someone won from lane eight!
Oh my lord, we have seen history made!