Exercise rider Faustino Aguilar takes Kentucky Derby entrant Dullahan for a workout at Churchill Downs Tuesday, May 1, 2012, in Louisville, Ky. (AP Ph - Yahoo! Eurosport

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Exercise rider Faustino Aguilar takes Kentucky Derby entrant Dullahan for a workout at Churchill Downs Tuesday, May 1, 2012, in Louisville, Ky. (AP Ph - Foto

Exercise rider Faustino Aguilar takes Kentucky Derby entrant Dullahan for a workout at Churchill Downs Tuesday, May 1, 2012, in Louisville, Ky. (AP Ph

Martedì 1 Maggio, 04:31 PM
Exercise rider Faustino Aguilar takes Kentucky Derby entrant Dullahan for a workout at Churchill Downs Tuesday, May 1, 2012, in Louisville, Ky. (AP Photo/Charlie Riedel)