World Athletics President Sebastian Coe wearing a protective face mask speaks to media as he inspects the National Stadium, the main stadium of Tokyo 2020 Olympics and Paralympics, in Tokyo, Japan, Oct. 8, 2020. (Issei Kato/Pool via Xinhua)

World Athletics President Sebastian Coe (C) wearing a protective face mask inspects the National Stadium, the main stadium of Tokyo 2020 Olympics and Paralympics, in Tokyo, Japan, Oct. 8, 2020. (Issei Kato/Pool via Xinhua)

World Athletics President Sebastian Coe (L) and CEO Jon Ridgeon wearing protective face masks inspect the National Stadium, the main stadium of Tokyo 2020 Olympics and Paralympics, in Tokyo, Japan, Oct. 8, 2020. (Issei Kato/Pool via Xinhua)

World Athletics President Sebastian Coe wearing a protective face mask speaks to media as he inspects the National Stadium, the main stadium of Tokyo 2020 Olympics and Paralympics, in Tokyo, Japan, Oct. 8, 2020. (Issei Kato/Pool via Xinhua)

World Athletics President Sebastian Coe (L) wearing a protective face mask speaks to media as he inspects the National Stadium, the main stadium of Tokyo 2020 Olympics and Paralympics, in Tokyo, Japan, Oct. 8, 2020. (Issei Kato/Pool via Xinhua)

World Athletics President Sebastian Coe (C) wearing a protective face mask inspects the National Stadium, the main stadium of Tokyo 2020 Olympics and Paralympics, in Tokyo, Japan, Oct. 8, 2020. (Issei Kato/Pool via Xinhua)