Usain Bolt is, yet again, perfect.
And with three gold medals in Moscow, the Jamaican great became the most successful athlete in the 30-year history of the world championships.
The 4x100-meter relay gold on Sunday erased the memories of the 100 title he missed out on in South Korea two years ago because of a false start. And, in combination with a similar 100-200-4x100 triple from Shelly-Ann Fraser-Pryce, Bolt was instrumental in giving Jamaica the first ever sweep in those six sprint events.
Canada's team of Justyn Warner, Aaron Kingsley Brown, Dontae Richards-Kwok and Gavin Smellie won bronze in 37.92 seconds after Great Britain was disqualified.
The United States was second in 37.66.
The bronze is Canada's fifth medal at the event, the most successful in the country's history at the world championships.
Bolt was trailing Justin Gatlin when he got the baton on the anchor leg, but a botched U.S. handover and his superlative speed were enough to see him, and his country, win.
He gritted his teeth, dipped at the line, and then grinned with relief.
"I am very satisfied," Bolt said, perhaps understating his greatness on the track.
Bolt had already won the 100 and 200 metres. It was his second such sprint triple at the world championships, matching the two he has won at the Olympics.
With his victory, Bolt moved to the top of the all-time world championships medals table with eight gold and two silver, edging Carl Lewis, who has eight gold, one silver and one bronze.
And again the Luzhniki Stadium and its 40,000 fans were turned into a Bolt party.
With palpable relief after a week of all-business during his earlier races, Bolt finally let go. His arms across his chest, he kicked his legs as he went down lower and lower to imitate a traditional eastern European dance to the delight of the crowd.
"A lot of energy here today," Bolt said.
He threw he shoes into the crowd and struck his iconic "Lightning Bolt" pose again, knowing he finally could let go of the stress as Bob Marley's "Three Little Birds" blared.
Twenty minutes earlier, Fraser-Pryce became the first woman in world championship history to sweep the sprint events, anchoring Jamaica to gold in the 4x100-meter relay.
Unlike Bolt, Fraser-Pryce got the baton with a big lead. With her pink hair extensions swaying in the air behind her, she kept on building on it to cross in a championship record of 41.29 seconds.

Jamaican women dominant too

Jamaica won the women's 4x100-meter relay Sunday at the world championships, giving Shelly-Ann Fraser-Pryce her third gold medal of the competition.
Carrie Russell, Kerron Stewart, Schillonie Calvert and Fraser-Pryce won in a championship record 41.29 seconds. Fraser-Pryce, who also won the 100 and 200, ran the anchor leg.
France took silver in 42.73 and the United States earned the bronze in 42.75.
Canada finished 7th in 43.28.

Defending champ Asbel Kiprop takes 1,500m

Asbel Kiprop of Kenya retained his title in the men's 1,500 metres Sunday at the world championships.
Matthew Centrowitz of the United States earned the silver and Johan Cronje of South Africa took the bronze.
Kiprop, the 2008 Olympic champion, surged ahead in the home straight and crossed the line in 3 minutes, 36.28 seconds.
Centrowitz clocked 3:36.78, and Cronje finished in 3:36.83.
Canadian Nathan Brannen was 10th in 3.38.09.

France's Teddy Tamgho wins men's triple jump

Teddy Tamgho of France won the men's triple jump at the world championships on Sunday, edging Pedro Pichardo of Cuba.
Will Claye of the United States took bronze.
Tamgho and Pichardo were even at 17.68 metres but Tamgho made the difference on his last jump when he leapt 18.04 for gold.
Claye was third with a jump of 17.52.
Olympic and defending champion Christian Taylor of the United States took fourth place with a leap of 17.20.

Kenya's Eunice Sum victorious in women's 800m

Eunice Sum of Kenya held off Olympic champion Mariya Savinova at the end to win the women's 800 metres Sunday at the world championships.
Sum won in 1 minute, 57.38 seconds. Savinova, who was also the defending champion, was second in 1:57.80.
Brenda Martinez of the United States took bronze in 1:57.91.

Obergfoell of Germany wins women's javelin

Christina Obergfoell of Germany won her first major javelin title at 31, beating Kimberley Mickle of Australia to clinch the world championship gold medal on Sunday.
Defending champion Maria Abakumova of Russia took bronze.
Obergfoell threw 69.05 metres on her second attempt, while Mickle settled for second with a toss of 66.25.
Abakumova, who holds the season's top mark, disappointed with a throw of 65.09.
Olympic champion Barbora Spotakova missed the championships because of maternity leave.