Doping

The usually much-discussed topic hasn't been making headlines during the Tokyo Games as often because of the pandemic. But it's still there.

Neither swimmers Ryan Murphy nor Luke Greenbank directly accused Evgeny Rylov of doping. But both said it was frustrating not to know if any of their competitors had a drug-induced advantage.

In an essay, Sharapova says she is stepping away from the sport she's been playing for 28 years. She's a five-time Grand Slam champion and former No. 1, who also served a 15-month ban for doping.

González, 30, won a silver medal at the Rio Summer Olympics. With the threat of suspension hanging over her, she had been training in hopes that she could compete in next year's Tokyo Games.

The World Anti-Doping Agency's compliance review committee made the call, despite protests from international athletes that they "will no longer have faith in the system."

This paves the way for him to compete in this year's Tour, which starts Saturday. The investigation started after a sample he provided was reported to contain more of an asthma drug than allowed.

Calling two doping cases "hugely disappointing," the IOC's executive board said that factors had "prevented the IOC from even considering lifting the suspension for the closing ceremony."

Nadezhda Sergeeva, a bobsled athlete, failed a drug test for a banned heart drug, the Russian Bobsled Federation announced on Friday.

Aleksandr Krushelnitckii and his wife have given up their mixed doubles medal after he tested positive for a banned drug. It's unwelcome news for a Russian delegation already embroiled in scandal.

"We express our sincere regret over the fact of this incident," the Olympic Athletes from Russia team says. The team says it will investigate, to see how a banned drug came to be in his system.