Usain Bolt leading Jamaica to the 4x100m relay victory.Usain Bolt leading Jamaica to the 4x100m relay victory.

Usain Bolt secured a sweep of the sprint golds at a World Champion-ships for the third time when he helped Jamaica’s relay team to a fourth successive 4x100 metres title yesterday.

The 29-year-old, who had already won the 100 and 200 metres events, ran the anchor leg as the Jamaicans took gold in 37.36 seconds at the Bird’s Nest Stadium.

The US team featuring Justin Gatlin, who won silver behind Bolt in both individual sprints, botched their final handover between Tyson Gay and Mike Rodgers and were disqualified after finishing second.

That elevated hosts China to a hugely popular silver medal in 38.01 with Canada taking the bronze in 38.13.

It was a record-extending 11th world gold for Bolt, who also won three sprint titles at the 2009 and 2013 World Championships.

His team-mates Nesta Carter, Asafa Powell and Nickel Ashmeade helped extend Jamaica’s dominance of the sprint relay to a sixth straight major global champion-ships, including the last two Olympic Games.

Earlier, the Jamaican women’s team, anchored by Shelly-Ann Fraser-Pryce, clocked the second fastest time in history to retain their 4x100 metres relay title.

Veronica Campbell-Brown, Na-tasha Morrison and 200 metres silver medallist Elaine Thompson ensured Fraser-Pryce had a good lead when she took the baton and the 100 metres champion stormed across the line in 41.07 seconds.

The US finished second in 41.68 with the early pace of the Jamaicans giving anchor Allyson Felix, the 400 metres champion in Beijing, no chance of catching Fraser-Pryce.

Trinidad and Tobago won the bronze in a national record of 42.03 ahead of Britain, whose 42.10 was also the best time ever run by the nation’s top women sprinters.

Men’s 50km walk

Matej Toth became the first Slovakian to win a gold medal at the World Championships when he cruised to victory in the men’s 50 km race walk.

The 32-year-old Toth won in a time of 3:40.32.

Australia’s Jared Tallent completed the journey in 3:42:17 with Japan’s Takayuki Tanii taking the bronze medal in 3:42:55.

Women’s high jump

Mariya Kuchina won the women’s high jump with a 2.01m clearance.

The 22-year-old Russian had a blemish-free card to that height, her lifetime best performance.

In silver and bronze positions were the medal winners from this event in the Bird’s Nest Stadium at the Beijing Olympics seven years ago – 31-year-old Croatian Blanka Vlasic and 33-year-old Russia Anna Chicherova.

Women’s 800m

Marina Arzamasova, of Belarus, outsprinted defending champion Eunice Sum down the straight to win gold in the 800 metres.

The European champion led from the front and found some extra gas when her Kenyan rival attacked off the final bend to claim the title in 1:58.03.

Canada’s Melissa Bishop stayed with the leading pair on the last 100 metres and got just in front of Sum at the line to claim silver in 1.58.12.

Dechatlon

American Ashton Eaton retained the decathlon world title and broke his own world record with a score of 9,045 points.

Eaton’s previous world record was 9,039, set at the US Olympic Trials in Oregon in 2012.

The silver medal went to Canada’s Damian Warner, with a national record total of 8,695 and German Rico Freimuth took bronze on 8,561.

Men’s discus

Piotr Malachowski of Poland claimed the discus gold medal with a throw of 67.40 metres.

The 32-year-old Pole dominated the event to finally win the world title after landing silver medals in 2009 and 2013 and being Olympic runner-up seven years ago.

The silver went to Philip Milanov, who broke the Belgian national record with 66.90 metres and Malachowski’s Polish team-mate Robert Urbanek took bronze with 65.18.

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