Simone Biles is dominating at the world gymnastics championships in Doha. She's already led the Americans to a team gold, and is starting to rack up her own medals.
The 21 year old beat Japan's Mai Murakami and teammate Morgan Hurd to secure the tittle. But even with the win, Biles was not at her best. She fell once on balance beam and vault and stepped out of bounds on floor.
The difficulty of her routines though helped her seal the deal to remain the best gymnast in the world.
Al Jazeera's Leah Harding reports from Doha.
