Martin Dwyer has broken his right thumb and a bone in his left elbow after suffering a bad fall at Leicester on Monday.
Red Lite jinked and unseated the Derby-winning jockey when holding every chance in the second division of the Aston Flamville Fillies’ Nursery.
Brian Meehan’s filly was neck-and-neck with eventual winner Speedfit Girl before jinking sharply to her left, giving Dwyer no chance of staying in the saddle.
The Berkshire-based rider stayed overnight in Leicester Royal Infirmary, where subsequent X-rays revealed breaks in an elbow and a thumb.
His father-in-law, trainer William Muir, said: “He’s not as sore as he was, but he’s got bad bruising as well as the two breaks.
“It could well be he will have to have a couple of operations to pin both the elbow and the thumb.
“When they took the neck-collar off he was in real pain, but the hospital went through some scans and found nothing, which is a huge relief.
“He’s very upset – he had some decent rides this weekend – but it could have been a lot worse.”
Dwyer was due to partner Classic hope Theyskens’ Theory in the Meon Valley Stud Fillies’ Mile at Ascot on Saturday.