Simone Biles, of the United States, cheers for teammates 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)

TOKYO (AP) — 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. That she was ready to carry the burden of outsized expectations.

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.

So rather than push through the doubts that crept into her head as she’s done so many times in the past, Biles decided enough was enough. She was done. For now.

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.

Jordan Chiles, Sunisa Lee and Grace McCallum guided the U.S. to silver while Biles cheered from the sideline in a white sweatsuit, at peace with a decision that revealed a shift not only in Biles but perhaps the sport she’s redefined.

“We also have to focus on ourselves, because at the end of the day we’re human, too,” Biles said. “So, we have to protect our mind and our body, rather than just go out there and do what the world wants us to do.”

The Americans — fueled by an uneven bars routine by Lee that not even Biles could match — drew within eight-tenths of a point through three rotations. ROC, however, never wavered on floor. And they erupted when 21-year-old Angelina Melnikova’s score assured them of the top spot on the podium for the first time since the Unified Team won in Barcelona in 1992.

The victory came a day after ROC men’s team edged Japan for the top spot in the men’s final. Great Britain edged Italy for bronze.

Biles is the latest in a series of high-profile athletes, including tennis star Naomi Osaka, who have used their platforms to discuss their mental heath struggles. A subject that was once taboo has become far more accepted and embraced.

U.S. Olympic and Paralympic Committee CEO Sarah Hirshland applauded Biles for prioritizing her “mental wellness over all else” and offered the organization’s full support.

Biles is scheduled to defend her Olympic title in the all-around final on Thursday. She also qualified for all four event finals later in the Games. She said she will regroup today before deciding whether to continue.