Jockey Ruby Walsh is set to be out of action for up to a month after X-rays showed he has aggravated the injury he received at Cheltenham nearly four weeks ago.

MARTIN BRASSIL, who trains just 12 horses on the Curragh, saddled easily the biggest winner of his career when Numbersixvalverde grabbed a last-gasp victory in the Goulding Thyestes Handicap ’Chase at Gowran Park yesterday.