FILE - In this Aug. 2, 2021, file photo, United States' Tamyra Marianna Stock Mensah, left, and Japan's Sara Dosho compete during the women's 68kg freestyle wrestling match at the 2020 Summer Olympics in Chiba, Japan. Tokyo Olympians are exercising extraordinary discipline against the coronavirus. They are sealed off in a sanitary bubble that has made competition possible but is also squeezing a lot of fun from their Olympic experience. (AP Photo/Aaron Favila, File)

FILE - In this July 25, 2021, file photo, members of team China walk to the next apparatus during the women's artistic gymnastic qualifications at the 2020 Summer Olympics in Tokyo. Tokyo Olympians are exercising extraordinary discipline against the coronavirus. They are sealed off in a sanitary bubble that has made competition possible but is also squeezing a lot of fun from their Olympic experience. (AP Photo/Ashley Landis, File)

FILE - In this July 27, 2021, file photo, face masks is attached to the arrows of Britain's Bryony Pitman during the women's individual eliminations at the 2020 Summer Olympics in Tokyo, Japan. Tokyo Olympians are exercising extraordinary discipline against the coronavirus. They are sealed off in a sanitary bubble that has made competition possible but is also squeezing a lot of fun from their Olympic experience. (AP Photo/Alessandra Tarantino, File)

FILE - In this July 31, 2021, file photo, passengers wearing face masks to help curb the spread of the coronavirus get on board a west-bound bullet train at Tokyo Station in Tokyo. Outside the Olympic bubble, fueled by the more contagious delta variant, infections in Tokyo have logged new daily records and nearly tripled in the first week after the Games opened on July 23. Japanese officials say the surge is unrelated to the Olympics. (AP Photo/Kantaro Komiya, File)

FILE - In this Aug. 2, 2021, file photo, Germany's Anna Carmen Schell, right, compete against Egypt's Enas Ahmed during their women's 68kg freestyle wrestling match at the 2020 Summer Olympics in Chiba, Japan. Tokyo Olympians are exercising extraordinary discipline against the coronavirus. They are sealed off in a sanitary bubble that has made competition possible but is also squeezing a lot of fun from their Olympic experience. (AP Photo/Aaron Favila, File)

FILE - In this July 30, 2021, file photo, cleaning crew worker wipes down the ring before the men's heavyweight 91-kg boxing match at the 2020 Summer Olympics, in Tokyo, Japan. Tokyo Olympians are exercising extraordinary discipline against the coronavirus. They are sealed off in a sanitary bubble that has made competition possible but is also squeezing a lot of fun from their Olympic experience. (AP Photo/Frank Franklin II, File)

FILE - In this Aug. 1, 2021, file photo, Olympic volunteer Reimi Kusunoki holds up a sign at the Enoshima yacht harbor during the 2020 Summer Olympics in Fujisawa, Japan. Tokyo Olympians are exercising extraordinary discipline against the coronavirus. They are sealed off in a sanitary bubble that has made competition possible but is also squeezing a lot of fun from their Olympic experience. (AP Photo/Gregorio Borgia, File)