Allyson Felix came out of a brief retirement to help the women's 4x400 relay make the final at world championships.

The competition has produced inspiring moments that have gotten the world’s attention and embodied the Olympic spirit.

The quest for gold medals is on track for the U.S. women’s basketball and volleyball teams after finishing at the top of their groups in pool play.

Sifan Hassan of the Netherlands started her bid to win three medals at the Tokyo Games by earning gold in the 5,000 meters.