Simone Biles was rushed to hospital in Qatar with a kidney stone, just hours before the American superstar makes her bow at this year’s world championships on Saturday.

The ten-time world champion, who is making her return to frontline international competition in Doha, tweeted late on Friday night that she was is in hospital.

However, she added that the emergency would not keep her from competing on Saturday in the qualification rounds for the women’s team competition.

She also tweeted a picture of herself in the hospital emergency room.

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Biles, 21, is making her return to the world stage after taking a year off in 2017 following her triumphant showing at the Rio Olympics, where she won four golds.

She is part of an exceptionally strong US team which is among the favourites for the team competition, as Biles is herself for the individual events.

Biles won golds at the 2013, 2014 and 2015 world championships, including two in the team event.