ATHLETICS WORLD CHAMPIONSHIPS
Venue: Olympic Stadium, Berlin Date: 15-23 August
Coverage: Watch the action live and highlights on BBC Two, BBC HD, Red Button, Radio 5 live and the BBC Sport website (video for UK users only)
Full BBC coverage details
Jamaica romp home in men's 4x100m relay
Usain Bolt missed out on a third world record but still made it a hat-trick of gold medals at the World Championships with Jamaica's win in the 4x100m relay.
Bolt, who had set new marks in winning the 100m and 200m titles in Berlin, ran the third leg as the Jamaican team crossed the line in 37.31 seconds.
Steve Mullings, Michael Frater and Asafa Powell were the other three members of the victorious team.
Trinidad and Tobago were second, with Great Britain taking bronze.
With the United States having been disqualified in the semi-final, the Jamaicans began the race as hot favourites.
But despite clocking the world's second fastest ever time in the 4x100m, there was slight feeling of disappointment when they failed to set a new mark.
"It is a little bit my fault," said an apologetic Bolt, who said he had not felt 100%.
Jamaican Mullings got the quartet off to a fine start and they were rarely troubled as Bolt handed over to Powell to bring the team home.
Trinidad and Tobago's time of 37.62s saw them set a new national record, while Britain, whose line-up included Simeon Williamson, Tyrone Edgar, Marlon Devonish and Harry Aikines-Aryeetey, ran a season's best 38.02 to grab an impressive bronze.
Misfortune for USA 4 x 100m relay teams (UK only)
It was Jamaica's seventh gold medal of the Championships and followed a win earlier in the afternoon for their 4x100m women's relay team.
For Bolt, who won triple Olympic gold in Beijing a year ago, it has been another stunning show.
The Jamaican, who only turned 23 on Friday, smashed the world records in both the 100m and 200m, clocking 9.58secs and 19.19secs respectively.
"Am I getting used to winning? You cannot get used to winning," he added. "But winning three gold medals in Berlin is wonderful and I am proud of myself."
Earlier on Saturday, Jamaica added the world 4x100m women's relay title to their impressive haul of sprint medals in Berlin as 100m champion Shelly-Ann Fraser guided the team to gold.
With 100m world silver medallist Kerron Stewart anchoring the team, they proved too strong for the Bahamas, with the Germans taking a surprise bronze.
The US, attempting to defend their title, failed to progress from the heats after 200m finalist Muna Lee struggled to get hold of the baton on the second handover and stumbled before pulling up with a hamstring injury.
Ethiopia had to settle for bronze in the women's 5,000m, while Kenya again secured the top two medals as Vivian Cheruiyot and Sylvia Kibet both ran down reigning world and Olympic champion Meseret Defar on the final straight.
"I got the silver medal in Osaka and today I improved to the gold, it's so great to be a champion," said Cheruiyot. "On my last 100m I was pushing so hard."
Anita Wlodarczyk of Poland set a world record of 77.96m to become women's hammer champion.
She reached the mark on her second effort and did not make any other attempts until the sixth and final series with German Betty Heidler winning silver ahead of Slovakian Martina Hrasnova.
In the men's marathon in central Berlin at the start of the day, Abel Kirui and Emmanuel Mutai secured a Kenyan one-two with Kirui clocking a championship-record time of two hours six minutes and 55 seconds after a blistering first half around the city.
Olympic bronze medallist Tsegay Kebede was third.