Aidan O'Brien seeks tenth St Leger victory at Doncaster on Saturday

Trainer Aidan O'Brien targets his tenth career success in the Betfred St Leger Stakes at Doncaster this Saturday. The field for the 250th running of the world's oldest Classic includes four O'Brien trainees, headlined by the Derby winner Christmas Day and stable companion Pierre Bonnard. Joseph O'Brien challenges the Ballydoyle contingent with Enceladus, a runner entering Group One company following wins at Royal Ascot and Goodwood. The race day card also features the Group Two Betfred Park Stakes, where More Thunder is slated for a return to seven furlongs. Other notable contests at the festival include the Betfred Champagne Stakes and the Betfred Portland Handicap. All races are scheduled for broadcast live on Sky Sports Racing.