After all the doubts, the grumbling and the gloom, Paris has finally embraced the Olympics, with some of its famously cynical residents even returning early from holidays to take part in the fun.

China's anti-doping agency (CHINADA) on Thursday urged the International Testing Agency (ITA) to intensify testing of U.S. track and field athletes, after American sprinter Erriyon Knighton tested positive for the banned substance trenbolone.

Marathon swimming is set to get underway amid concerns over water pollution in the river Seine.

The 26-year-old pipped Britain's Matthew Hudson-Smith.

Tebogo, also a finalist in the 100m, struck a psychological blow to Lyles, crossing the line in 19.96sec, while Lyles timed 20.08sec.

The 31-year-old Li beat Theerapong Silachai of Thailand by 7kg with Hampton Morris of the United States third, another 5kg back.

Following Novak Djokovic's dramatic gold medal victory at the Paris Olympics, Serbia is set to build a museum dedicated to the tennis great, according to the country's president.

There will be 21 medals up for grabs with the bulk of them being given out in athletics.

"The last hurrah, I'm done. I've always said I want to retire a champion, that's it," Harrington told Irish national broadcaster RTE.

The USA, record four-time women's football gold medallists, are still on course to win the title for the first time since 2012 after beating Germany 1-0 in extra time in Lyon, with Sophia Smith scoring the only goal.

Powerhouse Dutchman Harrie Lavreysen led the Netherlands to the men's team sprint cycling gold medal on Tuesday in new world record time to successfully defend their title.

Australian teenage skateboarding sensation Arisa Trew won Olympic gold in the women's park event on Tuesday, edging out Japan's Cocona Hiraki in silver and Britain's injured Sky Brown in bronze.

"I am going to be honest, I am mainly happy for Team France because when you see everyone picking up medals all over the place, you say to yourself that you can't let them down," Henry said.

"It wasn't the result I was hoping for, but we're very satisfied with what we achieved," said 29-year-old Alexandre after Brazil lost 3-1.

A Greek athlete has tested positive for banned substances at the Paris Games and has been expelled from the athletes' village, the Greek Olympic Committee said on Tuesday.

Saint Lucia's Julien Alfred targets an Olympic sprint double on Tuesday as Jakob Ingebrigtsen and Josh Kerr go head to head in a 1500m grudge match that promises fireworks.

Alfred is seeking to emulate Jamaica's Elaine Thompson-Herah, who did the 100m-200m double at the Rio 2016 Games and at the Covid-delayed Tokyo Olympics.

"What can I say? I just broke a world record at the Olympics, biggest possible stage for a pole vaulter," Duplantis said.

Chebet -- nicknamed "the smiling assassin" -- bided her time before accelerating past compatriot Faith Kipyegon down the home straight to take gold in 14min 28.56sec at the Stade de France.

Hosts France will play an Olympic men's football final for the first time in 40 years after beating Egypt 3-1 in extra time at the Lyon stadium on Monday and will face Spain for the gold medal.