Aidan O’Brien has cut his assault on the Vertem Futurity to just Wembley in his bid for a record-equalling 10th victory as nine horses were declared for the Group 1 at Doncaster.

O’Brien had seven entries at the confirmation stage but has decided to rely on Wembley on Saturday as he seeks to join the late Sir Henry Cecil as the most successful trainer in one of the calendar’s highest-profile two-year-old races.