Simone Biles, of the United States, watches gymnasts perform after she exited the team final with apparent injury, at the 2020 Summer Olympics, Tuesday, July 27, 2021, in Tokyo. The 24-year-old reigning Olympic gymnastics champion Biles huddled with a trainer after landing her vault. She then exited the competition floor with the team doctor. (AP Photo/Ashley Landis)

Simone Biles will not defend her Olympic title.

The American gymnastics superstar withdrew from Thursday’s all-around competition to focus on her mental well-being.

USA Gymnastics said in a statement on Wednesday that the 24-year-old is opting to not compete. The decision comes a day after Biles removed herself from the team final following one rotation because she felt she wasn’t mentally ready.

Jade Carey, who finished ninth in qualifying, will take Biles’ place in the all-around. Carey initially did not qualify because she was the third-ranking American behind Biles and Sunisa Lee. International Gymnastics Federation rules limit countries to two athletes per event in the finals.

The organization said Biles will be evaluated daily before deciding if she will participate in next week’s individual events. Biles qualified for the finals on all four apparatuses, something she didn’t even do during her five-medal haul in Rio de Janeiro in 2016.

The 24-year-old came to Tokyo as arguably the face of the Games following the retirement of swimmer Michael Phelps and sprinter Usain Bolt. She topped qualifying on Sunday despite piling up mandatory deductions on vault, floor and beam following shaky dismounts.

She posted on social media on Monday that she felt the weight of the world on her shoulders. The weight became too heavy after vaulting during team finals. She lost herself in mid-air and completed 1 1/2 twists instead of 2 1/2. She consulted with U.S. team doctor Marcia Faustin before walking off the field of play.