Galileo Chrome provided jockey Tom Marquand with a remarkable first Classic victory in the Pertemps St Leger at Doncaster.
Marquand discovered he would be riding Joseph O'Brien's colt barely 24 hours before the big race - after regular jockey Shane Crosse became unavailable because of a positive test for Covid-19.
While Crosse must therefore begin his period of isolation in Ireland, Marquand took his place and prevailed by a neck at 4-1 from 16-1 shot Berkshire Rocco.
Pyledriver (9-2) appeared set to make a bold bid for glory before wandering from a true line out on his own on the far side, and eventually finishing third a length further back.
