Mike Friday, the coach of the U.S. rugby sevens team walks on the field during a training session at the 2020 Summer Olympics, Sunday, July 25, 2021, in Tokyo. (AP Photo/Shuji Kajiyama)

Perry Baker, center right, of the U.S. rugby sevens team runs with a ball during a training session at the 2020 Summer Olympics, Sunday, July 25, 2021, in Tokyo.(AP Photo/Shuji Kajiyama)

Argentina's Santiago Mare soaks in an ice bath following a men's rugby sevens practice at the Tokyo 2020 Olympics, in Tokyo, Friday, July 23, 2021. (AP Photo/David Goldman)

Members of Argentina's men's rugby sevens team huddle on the field during a practice at the Tokyo 2020 Olympics, in Tokyo, Friday, July 23, 2021. (AP Photo/David Goldman)

FILE - In this March 1, 2020, file photo, United States' Perry Baker, left, runs away from South Africa's Muller Du Plessis during the Los Angels Sevens rugby tournament in Carson, Calif. This is one sport where COVID-19 restrictions cannot separate 14 humans competing for a ball in 14-minute chunks of time, a dozen times a day. (AP Photo/Ringo H.W. Chiu, File)

A member of Australia's men's rugby sevens team holds a ball during a practice at the Tokyo 2020 Olympics, in Tokyo, Friday, July 23, 2021. (AP Photo/David Goldman)

Folau Niua, of the United States rugby sevens team adjusts his head guard during a training session at the 2020 Summer Olympics, Sunday, July 25, 2021, in Tokyo. (AP Photo/Shuji Kajiyama)

Argentina's Lucio Cinti, right, tackles Franco Sabato during a men's rugby sevens practice at the Tokyo 2020 Olympics, in Tokyo, Friday, July 23, 2021. (AP Photo/David Goldman)

Members of Australia's men's rugby sevens team hold a practice at the Tokyo 2020 Olympics, in Tokyo, Friday, July 23, 2021. (AP Photo/David Goldman)