American gymnast and four-time Olympic gold medallist Simone Biles has withdrawn from Thursday's individual all-around final in Tokyo.
Biles, the most successful US gymnast of all time, said she had to prioritize her mental health after pulling out of the women's team final on Tuesday.
The head of the US Olympic team and fellow athletes praised Biles' decision to focus on her mental wellbeing.
The 24-year-old has reached all five individual finals in Tokyo.
She was due to defend her all-around title on Thursday before competing in the finals of the vault and uneven bars on Sunday, 1 August, floor on Monday, 2 August and beam on Tuesday, 3 August.
Biles scored her lowest Olympic vault score in the opening rotation before withdrawing from the team final.
She left the arena but returned to support her team-mates as the defending champions claimed silver behind the Russian Olympic Committee.
Team silver in Tokyo was Biles' sixth Olympic medal and took her tally of Olympic and World Championship medals to 30.