Tony McCoy has been taken to hospital with suspected fractured ribs after a final-fence fall at Taunton on Friday.
The 16-time champion jockey was riding Laudatory in the Steve Logan Memorial County Contractors Handicap Hurdle.
Clerk of the course Michael Trickey said: "He had some morphine and they've taken him to hospital. He has suspected cracked ribs."
McCoy is due to be in action at Warwick on Saturday, where he has four rides.
However, he gave up his final ride of the day, Hopeful Start, in the totetrifecta Handicap Chase.
An on-duty medical officer at Taunton added: "He's fallen off his horse and appears to have been kicked. He's now been taken to Musgrove Park Hospital."