“Unless an effective vaccine is developed, I think it will be difficult to hold the Olympics next year,” the president of the Japan Medical Association added.
The Japanese prime minister says the latest the games would be held is the summer of 2021.
Canada and Australia say they won't send athletes to Tokyo if the Games are held in July.
Athletes and anti-doping agency administrators say they're frustrated that the World Anti-Doping Agency can't punish Russia more.
A 50-year-old worker died this week, reportedly of heatstroke, as temperatures in Tokyo rose to an average of 94 degrees.
Nothing like being a good sport with some environmentally-conscious bling.
This fight isn't merely about parkour. It's about who controls the new youth-centric sports that are the Olympics' future.
Jones, who recently won Wales’ Sports Personality Of The Year award, has been thinking about her future after Tokyo 2020, and MMA is on her radar.
Having become the UK’s first taekwondo gold medallist at London 2012 before winning once again at Rio, we chat to Jade Jones about her groundbreaking role in British martial arts.
Working with skateboarders and the Olympics was never a life goal for Gary Ream, but now the president of the International Skateboarding Federation is tasked with helping steward the sport's Olympic debut.
"If there's a drug test 95 percent of them won't be able to compete."
Professional surfers from around the world share their opinions on surfing being a part of the 2020 Tokyo Games.