Peter Disera of Canada rides at the start of the men's cross country mountain bike competition at the 2020 Summer Olympics, Monday, July 26, 2021, in Izu, Japan. (AP Photo/Christophe Ena)

Masked fans watch from a hillside during the men's cross country mountain bike competition at the 2020 Summer Olympics, Monday, July 26, 2021, in Izu, Japan. (AP Photo/Thibault Camus)

Mathieu van der Poel of the Netherlands tumbles on a downhill during the men's cross country mountain bike competition at the 2020 Summer Olympics, Monday, July 26, 2021, in Izu, Japan. (AP Photo/Thibault Camus)

Mathieu van der Poel of the Netherlands gets up after crashing on a downhill during the men's cross country mountain bike competition at the 2020 Summer Olympics, Monday, July 26, 2021, in Izu, Japan. (AP Photo/Thibault Camus)

Fans watch from a hillside as Nino Schurter of Switzerland competes during the men's cross country mountain bike competition at the 2020 Summer Olympics, Monday, July 26, 2021, in Izu, Japan. (AP Photo/Thibault Camus)

Thomas Pidcock of Great Britain (29) and Nino Schurter of Switzerland (1), behind, competeduring the men's cross country mountain bike competition at the 2020 Summer Olympics, Monday, July 26, 2021, in Izu, Japan. (AP Photo/Christophe Ena)