3. Simone Biles (USA)

At the 2018 World Artistic Gymnastics Championships in Doha, the 21-year-old Biles bagged four gold medals at the team event, all-round, pommel horse and floor exercise, becoming the gymnast with the most world gold medals of any gender with 14. She also won a silver in uneven bars and a bronze in balance beam to become the first gymnast since 1987 to win a world medal in every event.