DOHA, Nov. 2 (Xinhua) -- American superstar Simone Biles became the first gymnast to win 13 world championships gold medals after claiming her first vault world title at the ongoing world championships held in Doha, Qatar on Friday.

Biles nailed both of her difficult vaults for the world title. Her two-vault average score of 15.366 topped second-place Shallon Olsen of Canada, who scored 14.516. Mexico's Alexa Moreno won bronze at 14.508.

The 21-year-old gymnast then went on to win a silver in uneven bars, her first uneven bars medal in world's major events. By doing so, she became the first American to win world championships medals in every event - team, individual all-around and on all four apparatuses.

The vault gold marked Biles' third world title so far in Doha, with opportunities to win more golds before the competition wraps up on Saturday. Biles will go for titles in floor exercise and balance beam.