Aidan O'Brien fields Excelebration and strong team for Breeders' Cup

• Short gap since last run is only concern for Mile favourite• Last-minute concern over Starspangledbanner's legs Aidan O'Brien said on Wednesday that the short break since the Queen Elizabeth II Stakes at Ascot is his only concern as he prepares to saddle Excelebration, the likely favourite, in the Breeders' Cup Mile here on Saturday. Excelebration is, according to official figures, the highest-rated horse that O'Brien has ever taken to a Breeders' Cup and arrives with a higher mark...