Simone Biles endured a less-than-ideal build-up to her return to international gymnastics when she was admitted to hospital with a kidney stone on Friday night.
The 21-year-old was due to compete on Saturday afternoon in the qualifying rounds of the World Championships in Doha.
The 10-time world champion tweeted a message from her hospital bed which read: "Nothing like a late night ER visit less than 24 hrs before world championships.
"This kidney stone can wait... doing it for my team!"
