Mackay suffers multiple fractures in spill on Thursday night
Jockey Nicky Mackay broke his femur and fractured his leg in three places in a fall at Chelmsford on Thursday night.
Mackay was riding odds-on favourite Royalistic in the last race, a 1m2f maiden, when his mount began to hang badly right entering the final furlong before crashing through a rail.
Mackay, 32, was unseated and after being attended to at the track was taken to hospital, where x-rays revealed he had sustained a broken femur and three fractures to his lower leg. Royalistic was unhurt.
John Gosden, who trains Royalistic, said: "It looks as though Nicky has broken his leg in a few places poor chap, but it was a bizarre accident as the horse had already run up that straight."