Simone Biles has thanked her teammates who "stepped up when I couldn't" after she withdrew from the 2020 Tokyo Olympics yesterday.

The gymnast praised teammates Jordan Chiles, Suni Lee, and Grace McCallum for "stepping up" after she unexpectedly pulled out of the women's gymnastics team final at the Games.

Biles took to Instagram just hours after the Team USA's gymnastics squad won silver to thank her girls for "having my back."

Sharing a picture of the team posing with their silver medals, she wrote: "OLYMPIC SILVER MEDALISTS.

"I'm SO proud of these girls right here. You girls are incredibly brave & talented! I'll forever be inspired by your determination to not give up and to fight through adversity! They stepped up when I couldn't. thanks for being there for me and having my back! forever love y'all."

Teammate Chiles responded: "You will forever be loved. We can't thank you enough. You have such a huge inspiration on all of us. We wouldn't have done it without you. love you mo."

Biles exited the competition on Tuesday with the team's medical trainer Marcia Faustin after a shaky vault routine which earned her the lowest vault score of her Olympics career.

Explaining her early departure, Biles said she had to focus on her mental health.

As per BBC Sport, Biles spoke afterward and said: "After the performance I did, I just didn't want to go on. I have to focus on my mental health. I just think mental health is more prevalent in sports right now. We have to protect our minds and our bodies and not just go out and do what the world wants us to do.

"I don't trust myself as much anymore. Maybe it's getting older. There were a couple of days when everybody tweets you and you feel the weight of the world. We're not just athletes. We're people at the end of the day and sometimes you just have to step back."

She has since also withdrawn from Thursday's women's all-around final.

USA gymnastics explained that Biles will now be "evaluated daily" to determine her participation for next weeks individual event finals, BBC Sport reported.

"Simone will continue to be evaluated daily to determine whether or not to participate in next week's individual event finals," they said. "We wholeheartedly support Simone's decision and applaud her bravery in prioritising her wellbeing. Her courage shows, yet again, why she is a role model for so many."