Tonight at the Tokyo Olympics, Australian superstar Ariarne Titmus upset Katie Ledecky in the 400-meter free, seen as Ledecky's toughest race. Men's sprinter Caeleb Dressel earned his first Olympic medal in Tokyo, in the 4x100 relay.
Women's skateboarding will award its first ever Olympic gold. U.S. softball will play against Japan in a preview of what's to come in the gold-medal game later this week. And in the early morning Eastern time on Monday, the U.S. men's gymnastics team will attempt an upset of its own: After a fourth-place finish in qualifications, the Americans will aim for the podium in team finals.