Simone Biles pulled out of the gymnastics women’s team final at Tokyo 2020 before her United States team went on to claim silver.
Biles, 24, briefly left the arena after scoring 13.766 on the vault in the first rotation – her lowest score on that apparatus in her Olympics career.
She returned to support her team-mates, but was replaced by Jordan Chiles for the uneven bars, beam, and floor.
The Russian Olympic Committee team won gold, with Great Britain taking bronze.
Biles is the most successful US gymnast of all time and winner of four gold medals and a bronze at Rio 2016.
There were no obvious signs of injury following her vault, in which she failed to stick her landing, but she returned from the treatment room appearing to flex her ankle, reports BBC Sport’s John Watson in Tokyo.
She has reached all five individual finals and is next due compete on Thursday, when she will attempt to become the first woman to retain the Olympic all-around title since 1968.
The US were the favourites in Tokyo after winning five successive world titles – in 2011, 2014, 2015, 2018 and 2019 – in addition to their back-to-back Olympic gold medals in London and Rio.
BBC