Bryan Cooper is set for a lengthy spell on the sidelines after it was confirmed the jockey broke his leg in a fall at Down Royal on Monday.
One of the emerging stars of the National Hunt scene, Cooper shot into the limelight when riding three winners at the Cheltenham Festival, while he was also on target with First Lieutenant at the Grand National meeting at Aintree.
The young rider was partnering the Tony Martin-trained Tepalo in Monday's Weatherbys Beginners Chase when he came to grief.
Cooper's agent, Alan Donoghue, said: "He's broken his left femur and it's a clean break. It's a bad injury.
"Nobody has put a timescale on how long he's going to be out for yet. He's going to have an operation later this morning, but you'd imagine it will be a good couple of months.
"It's unfortunate but that's racing. There are ups and downs."