Bouncing back from the worst finish of her brilliant Olympic career, Katie Ledecky has claimed her first-ever gold medal in women’s 1,500-metre freestyle.
Naomi Osaka lost 6-1, 6-4 to Marketa Vondrousova after an error-strewn performance, ending her cherished dream of winning on home soil.
The upsets continued in the women's 400 medley when Japan's Ohashi delighted the host nation to topple defending champion Katinka Hosszu.
As China and Ecuador celebrated their wins, there was disappointment for Japan as gymnastics star Kohei Uchimura crashed out of the horizontal bar competition.
Planned initially for summer 2020, the Tokyo Olympics were held back by closed borders, and now a late resurgence in the virus means they will be played without any live spectators, either from Japan or abroad, according to an IOC ruling.
Organisers insist games can go ahead with “proper measures” but a prominent public health expert warns “bubble system is kind of broken” and infections can spread to the local community.
Two more athletes are reported to have tested positive on Monday as fears grow some games could be at risk.
Organisers decide to reduce Games to a made-for-TV event as Japan declares state of emergency in Tokyo to contain rising coronavirus infections.
The 12-member squad will be led by San Antonio Spurs head coach Gregg Popovich with assistant coaches Steve Kerr, Lloyd Pierce and Jay Wright.
"I'm actually not on the Olympic list, so... Not that I'm aware of. If so, then I shouldn't be on it," Serena Williams says, while refusing to divulge reasons for her decision.
Roger Federer says that how things go over the coming fortnight will affect his plans for the next couple of months.
Team USA will begin training camp early next month in Las Vegas ahead of its first match at Tokyo Olympics on July 25 against France.
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