IN-form jockey Frankie Dettori has been booked for the ride on one Breeders’ Cup favourite and lost another after it was confirmed on Sunday he would partner Ulysses for Sir Michael Stoute at Del Mar but not Lady Aurelia, on whom he suffered an agonisingly narrow defeat in the Nunthorpe Stakes.

Although Jim Crowley has partnered Ulysses in his last five starts, winning the Coral-Eclipse and Juddmonte International this summer, Dettori is the colt’s preferred rider in California on Saturday, where he will be bidding to improve on last year’s fourth-place finish on the same horse in the same race.

The popular Italian will not get the chance to avenge Lady Aurelia’s loss to Marsha at York – where he celebrated victory, only for the Sir Mark Prescott-trained runner to be declared the winner by a nose – in the Breeders’ Cup Turf Sprint.

This ride has been handed to John Velazquez under a previous arrangement that he would ride the filly when she ran in the US and Dettori would be her rider in Europe.

Dettori leaves for California in a rich vein of form after a treble at Newbury on Saturday took him to 11 wins from his last 18 rides. He has never before ridden at Del Mar, where he will be hoping to add to his 12 Breeders’ Cup winners.

Ulysses, third to the Dettori-ridden Enable in the Arc, is 5-2 joint favourite for the Turf with the Aidan O’Brien-trained defending champion Highland Reel. – from Racing Post.