Nigeria’s Tobi Amusan set a world record in the semifinals, then ran an even faster, wind-aided time in the final to take the gold medal in the 100-meter hurdles at world championships.

Kamila Valieva was back on the Olympic ice at the Beijing Games for the individual competition.

A doctor in Texas became the first person to be charged under a landmark U.S. law designed to add legal accountability to a global anti-doping system that has long struggled to regulate himself.

Federal prosecutors have charged a Texas man with providing performance-enhancing drugs to athletes competing in the 2020 Olympics in Tokyo, including the star Nigerian sprinter Blessing Okagbare.

There's no denying the absences felt in track and field -- both in the stands and on the starting blocks. But the athletes in Tokyo this year are breathing life into track and field with new remarkable feats of athleticism and altruism.

The 2008 Olympic long jump silver medalist tested positive for human growth hormone.

Elaine Thompson-Herah broke Florence Griffith Joyner’s 33-year-old Olympic record in the women’s 100 meters.

Belinda Bencic of Switzerland won the women’s tennis gold medal in singles and she could add another in doubles.