TOKYO — Simone Biles arrived in Tokyo as the star of the U.S. Olympic movement and perhaps the Games themselves. She convinced herself she was prepared for the pressure.

Only, as the women’s gymnastics team final approached on Tuesday night, something felt off. And the athlete widely considered the Greatest of All Time in her sport knew it.

The American star withdrew from the competition following one rotation, opening the door for the team of Russian athletes to win gold for the first time in nearly three decades.