Tokyo 2020: Simone Biles out of US team during Olympic final

Gymnastics superstar Simone Biles, a four-time gold medallist at the 2016 Rio Games, produced a lacklustre opening vault and then briefly left the competition floor, before returning to join her teammates.

Simone Biles' participation in the rest of the Tokyo Olympics was plunged into uncertainty on Tuesday after she was dramatically withdrawn from the team final with a "medical issue".

Tokyo 2020: Simone Biles out of US team during Olympic final. (REUTERS)

The American gymnastics superstar exited the final after a lacklustre opening vault and briefly left the competition floor, before returning to join her teammates. (TOKYO 2020 COVERAGE)

But the US team replaced her in the three concluding routines on the uneven bars, beam, and floor.

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A statement from USA Gymnastics said Biles was suffering from an unspecified "medical issue" and faced daily assessment to determine whether she can continue her Olympic campaign.

"Simone has withdrawn from the team final competition due to a medical issue. She will be assessed daily to determine medical clearance for future competitions," the statement sent to AFP said.

The four-time gold medallist at the 2016 Rio Games qualified for all six finals available to her but her performance in qualifying on Sunday was littered with uncharacteristic mistakes.