United States sprinter Erriyon Knighton went to court Monday to defend his claim he was contaminated in a positive doping ...

United States sprinter Erriyon Knighton went to court Monday to defend his claim he was contaminated in a positive doping test case that risks a ban from the next world championships. A two-time ...

FILE - Erriyon Knighton, of the United States, reacts following his men’s 200-meter semifinal at the 2024 Summer Olympics, on Aug. 7, 2024, in Saint-Denis, France.

LAUSANNE, Switzerland (AP) — United States sprinter Erriyon Knighton went to court Monday to defend his claim he was contaminated in a positive doping test case that risks a ban ...

FILE - Erriyon Knighton, of the United States, reacts following his men's 200-meter semifinal at the 2024 Summer Olympics, on Aug. 7, 2024, in Saint-Denis, France. Petr David Josek - AP ...