St Leger winner ruled out of Superstakes and Diamond Mile

Next week's Superstakes and next month's Diamond Mile will be missing one of the top three year olds and classic winner for this season. St Leger winner and Derby runner-up Marquesas has been ruled out for the remainder of this year after sustaining a right knee injury which was further aggravated in the Nigel B. Nunes Memorial Cup on last month's Heroes Day programme.

As a result, the 3 year old bay colt  will now undergo surgery on November 12. The surgery will be performed by Barbadian-born equine veternarian Dr Jonathan White who also operated on another top 3 year old, Patriarch earlier this year. Marquesas who also finished 4th in this year's 2000 Guineas, racked up stakes earnings of $4.75 million from 7 starts this season.