Some of the athletes who tested positive for the coronavirus were first-time Olympians. They all must wait in a "quarantine hotel" for up to 10 days and watch their teammates compete without them.

Australia was once seen as a safe haven from COVID-19. NPR's Ailsa Chang talks with Bloomberg's Georgina McKay in Sydney about the rise in new cases and Australians' protests of lockdown measures.

For athletes in Tokyo, the games aren't just defined by competing but by COVID-19 — and avoiding it long enough to participate. Already 20 athletes have had their Olympic dreams dashed by the virus.

The number of hospitalized COVID-19 patients has doubled over the past month, and experts estimate that the current fifth wave of infections still has a week or two to go before reaching its peak.

China is battling to stem the spread of new cases tied to the more infectious variant. Nearly 200 people have been infected since last week, when a case was detected at an international airport.

About 300 unarmed soldiers are joining local police in the city of 6 million to enforce coronavirus restrictions as authorities try to quell a new outbreak linked to the delta variant.

French judo athlete Teddy Riner, a 6-foot-8, two-time gold medalist known as "Big Ted," has dominated his sport for a decade. It was a shock when he lost in a quarterfinal fight.

In addition to smashing a longtime world record, Tatjana Schoenmaker took home South Africa's first gold medal of the Tokyo Games.

This means they'll head to the semifinal. The U.S. is trying to become the first reigning Women's World Cup champion to win Olympic gold.

The Serbian star was beaten in the men's tennis semifinal by Germany's Alexander Zverev. It means Djokovic can't make history by winning all four major tournaments and Olympic gold in a single year.