Four and countingpublished at 14:18
Three 100m world titles, four 200m, three sprint relay world titles - can he add an 11th world title this weekend? We've learnt never to doubt him.
Summary
Bolt (19.55) wins 200m gold from Gatlin in silver (19.74)
GB's Zharnel Hughes fifth
USA's Allyson Felix wins 400m for ninth world title
Christine Ohuruogu eighth in 400m
GB's Sophie Hitchon fourth in hammer final
Asher-Smith wins 200m semi in 22.12
GB's Oskan-Clarke wins 800m semi-final
Four and countingpublished at 14:18
'He tried to kill me"published at 14:17
"He tried to kill me, I don't know what was going on," jokes Bolt, his voice going up a few octaves as he tries to explain how the photographer crashed into him.
And as the interview ends, Bolt quips into the camera: "Michael Johnson, stop doubting me, bro"
The great Johnson in the studio is outraged. Oh the japes...
It's a big deal - Boltpublished at 14:15
Usain Bolt is laughing and smiling with Phil Jones before the cameras roll.
"For me it's a big deal," says Bolt, before adding that his victories are a result of hard work and dedication.
'Blessed to watch Bolt'published at 14:13
Mike Costello
BBC Radio 5 live athletics commentatorQuote MessageUsain Bolt's appeal beyond his own sport makes him one of the greatest athletes of all time. His appeal is huge. Everybody runs in a sprint race at school and can relate to what he does when he runs fast, but he gives the crowd something to remember afterwards by turning it into a party, and that's why he will be missed so much when he goes.
Image source, Getty Images'Bolt is a legend'published at 14:13 British Summer Time 27 August 2015
Men's 200m final
Quote MessageI came out and gave it my best. Coming here my back felt a bit sore so I couldn't give it everything that I wanted but in the end I finished injury-free. Usain Bolt is a legend, man. I even doubted him a bit but he knows what to do so credit to him and congratulations to him.
Great Britain's Zharnel Hughes, Fifth in the men's 200m final
There's only one Boltpublished at 14:12
Michael Johnson dampens the mood by reminding us that the sport merely has two more years of Bolt's show-stopping antics. (The 10-time world champion set to retire after the 2017 World Championships.)
"Who will take over," asks Johnson. Who indeed. There's no-one quite like Bolt, not on the track and certainly not off the track.
Get involved #bbcathleticspublished at 14:11 British Summer Time 27 August 2015
Ankush Datar: You can't run from 2 things - 1 Your Future 2 Usain Bolt.
Matthew Harris: I dunno why people are always surprised when Usain Bolt kills it. He is the fastest man alive. He is the Flash.
'Bolt surprised us'published at 14:10 British Summer Time 27 August 2015
Michael Johnson
400m world record holder on BBC TV"What surprised me is the bend Usain Bolt ran. Gatlin tightened up trying to keep up with Bolt. I expected Gatlin to be ahead of Bolt on the bend and then Bolt would catch him, but Bolt surprised us in terms of the time.
"He is the best in the world and he does not have any rivals. We have to give him a lot of credit for running in the 100m and 200m - this is the most he has been challenged.
"He won the 100m, then there were questions of whether he would run in the 200m but he came and ran in a world-leading time. We haven't seen this type of showdown since Bolt came into prominence in 2008.
"A personal best from Zharnel Hughes. He can't be disappointed with that. He has had three very good races."
'Bolt the perfect ambassador'published at 14:10 British Summer Time 27 August 2015
Darren Campbell
Former British sprinter on BBC Radio 5 liveQuote MessageWhat Usain Bolt does for the sport is incredible. He's taken the sport to another level. Everywhere you go people know Usain Bolt.
Selfie for Boltpublished at 14:09
Usain Bolt continues his lap of honour but there's chaos in the stands with stewards running into the crowd to stop a fan from running onto the track.
Bolt, though, unfazed and simply grabs a selfie stick to pose with the crowd in the background.
Photographer clobbers Boltpublished at 14:06
If there were those who doubted whether Usain Bolt was the greatest athlete this planet has seen, surely these championships have forced them to reassess their views.
A bit of drama on the sidelines because a photographer has accidentally knocked the double champ over. Gatlin couldn't topple him but a clumsy cameraman can. Bolt smiles as he hobbles away from the clash. He should be ok for the relay.
'A great experience'published at 14:03 British Summer Time 27 August 2015
Quote MessageI've had a bit of pain in my back but my physio did a great job. I got a personal best and I can't wish for better than that. I got into the final and that's a major achievement for me.
Britain's Zharnel Hughes after coming fifth in the 200m final
'A really special moment'published at 14:03 British Summer Time 27 August 2015
Men's 200m final
Colin Jackson
Two-time world 110m hurdles champion on BBC TV"This for me is a really special moment for Usain. He will know he has been challenged in his brain and challenged physically but he has been in great form. He will think he got the victory far easier than he thought he would've done."
Image source, Getty ImagesHughes fifth in PB 20.02published at 14:02
Britain's Zharnel Hughes recorded a personal best 20.02, which was good enough for fifth.
Bronze goes to South Africa's Anaso Jobodwana in a national record 19.87.
Postpublished at 14:00
Usain Bolt sitting on a chair, allowing the photographers to do their thing. The Jamaican is breathing heavily,
And then Justin Gatlin rocks up and he brings up a pew. The American and Jamaican shake hands. Both sweaty, both exhausted.
'Unbelievable Bolt'published at 14:00 British Summer Time 27 August 2015
Bolt wins 200m gold
Quote MessageThis was unbelievable. Usain Bolt is my hero. He came here and delivered when he's not had the best of seasons. That was a lesson in how to run 200m
Injured British sprinter Adam Gemili on Radio 5 live
Image source, Getty Images'Bolt is the greatest'published at 13:59 British Summer Time 27 August 2015
Men's 200m final
Steve Cram
BBC athletics commentatorQuote Message"Two golds for Bolt. He's too good for Gatlin. Silver for the American. Bolt won it in the first 20 metres. Out well and there was no way Gatlin was going to close that down. "Resurrecting a performance like that from a season he has had shows Usain Bolt is the greatest."
Gatlin silver in 19.74published at 13:58
Bolt won by a greater distance than the 100m and his 19.55 was a world lead. Justin Gatlin settles for silver again, his time - 19.74
Bolt wins in 19.55published at 13:56
Magnificent! A super start from the defending champion and Justin Gatlin could not chase him down. Usain Bolt wins a 10th world title with a brilliant 19.55 second run.
Image source, Getty ImagesPostpublished at 13:56 British Summer Time 27 August 2015
Usain Bolt gets off quickly. Bolt ahead out of the bend...