Confidence in Ruler Joseph O'Brien is confident Ruler Of The World can maintain his unbeaten record and hand father Aidan a remarkable 11th Dubai Duty Free Irish Derby on Saturday evening. The master of Ballydoyle has saddled the likes of Galileo (2001), High Chaparral (2002) and last year's hero Camelot to win Ireland's premier Classic, with that trio all succeeding on the back of Epsom Derby glory. Ruler Of The World, ridden by Ryan Moore at Epsom, bids to follow in their hoofprints at the Curragh, with the trainer's son getting back on board for the first time since he won his maiden at the track in April. O'Brien jnr, who claimed his first Irish Derby aboard Camelot a year ago, said: "He's an exciting horse. He's won three times from three runs and he won very nicely the last day at Epsom so we're looking forward to it. "He was ready to run early as a two-year-old and he was in the Chesham (at Royal Ascot) until very late on, he was going to run but then he got a little cough. "They couldn't shift the cough for the rest of the year but he's a very exciting horse. "You'd be hoping he'll improve for the experience of Epsom, the Curragh is a fair track and he's won there already," the jockey told At The Races. O'Brien senior, who has won the last seven Irish Derbies, added: "We have been very happy with him (since Epsom). "He impressed us at Epsom and we think the Curragh will suit him even better." Likely pacesetter Festive Cheer, the mount of Seamie Heffernan, also runs for the Ballydoyle team.