The Aidan O’Brien pair City Of Troy and Los Angeles head 16 declarations for Saturday’s Betfred Derby, which at £1.5m is Britain’s richest Flat race and is one that the trainer has already won a record nine times.

City Of Troy was the short-priced winter favourite for the Derby after his unbeaten juvenile season saw him rated head and shoulders above his contemporaries, and despite running poorly in the QIPCO 2000 Guineas on his return he is favourite once again.

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