Oisin Murphy is expected to be out of the saddle for three to four weeks with a broken collar bone.
Murphy took a fall at Southwell on Wednesday when the fatally-injured Vivacissimo slipped up on the bend.
The jockey then took his next mount on Andrew Balding's odds-on favourite Mystic Blaze but was beaten into second.
Balding said: "He broke his collar bone when he had the fall and will be out for three or four weeks.
"He took the ride after it and rode through the pain but then took himself off to hospital.
"I think they said he had snapped his clavicle."