White House press secretary Jen PsakiJen PsakiBiden does not plan to shield Trump docs in Jan. 6 probe The Hill's 12:30 Report - Presented by Facebook - Arizona recount to show Trump's loss by even wider margin Watch live: Psaki, Homeland Secretary Mayorkas hold press briefing MORE says Simone Biles is "still the GOAT," after the superstar athlete unexpectedly withdrew Tuesday from the U.S. women's Olympic gymnastics team final.

"Gratitude and support are what Simone Biles deserves," Psaki wrote in a Twitter post shortly after Biles's shock exit.

USA Gymnastics said Biles was withdrawing due to a "medical issue." Multiple outlets reported that the decorated gymnast's withdrawal was because of mental health and not a physical injury.

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Biles, 24, said she was "fighting those demons," according to The New York Times.

“At the end of the day, I have to do what was right for me,” Biles said. “It just sucks that it happened at the Olympic Games.”

Biles has not said if she will compete in the individual all-around competition later this week.

Saying Biles should still be considered the greatest of all time, or GOAT, Psaki added, "We are all just lucky to be able to see her in action."

The White House spokeswoman also offered congratulations to the "tough as nails" women's gymnastics team, which earned a silver medal in the team event. The Russian team took home the gold.