High Definition will start favored in Saturday&rsquo;s Group 1 Irish Derby at The Curragh, three weeks after he was expected to have a similar role in the English Derby at Epsom Racecourse.In a surprise, trainer Aidan O&rsquo;Brien omitted High Definition from the final entries of the English Derby.In the $1.19 million Irish Derby at 1 1/2 miles, High Definition will be tested against 10 rivals, including Mojo Star and Hurricane Lane, who were second and third in the English Derby at 1 1/2 miles. High Definition was the 8&#45;5 favorite with bookmakers as of Thursday.Owned by the Coolmore syndicate and Georg von Opel, High Definition was unbeaten in two starts at 2 in 2020, including the Group 2 Beresford Stakes at a mile at The Curragh. A colt by Galileo, High Definition was the future&#45;book favorite for the English Derby over the winter, but finished third in his only start this year in the Group 2 Dante Stakes on May 13 at York, losing by two lengths to Hurricane Lane.O&rsquo;Brien has five of the 11 runners in the Irish Derby, although the other four are outsiders. O&rsquo;Brien has won the Irish Derby a record 14 times, including three of the last four runnings. O&rsquo;Brien&rsquo;s son Joseph won the 2018 Irish Derby with Latrobe.Mojo Star, winless after three starts, achieved a 50&#45;1 surprise second in his stakes debut in the English Derby, finishing 4 1/2 lengths behind Adayar. Trained by Richard Hannon, Mojo Star was 5&#45;1 on Thursday, the same price as Hurricane Lane, who is trained by Charlie Appleby for Godolphin Racing.Hurricane Lane was beaten 7 3/4 lengths in the English Derby and was reported to have lost both of his front shoes in the running, according to a veterinary report.Mojo Star and Hurricane Lane are the English shippers for the Irish Derby. Aside from High Definition, the home team&rsquo;s chances include Mac Swiney, winner of the Group 1 Irish 2000 Guineas in May who was fourth in the English Derby; Earlswood, trained by former jockey Johnny Murtagh; and Fernando Vichi, trained by O&rsquo;Brien&rsquo;s son Donnacha.Fernando Vichi won the listed Nijinsky Stakes at 1 1/2 miles on June 3 at Leopardstown. Earlswood won the Group 3 Gallinule Stakes at 1 1/4 miles on May 23 at The Curragh, beating Arturo Toscanini, one of Aidan O&rsquo;Brien&rsquo;s hopes in the Irish Derby.Murtagh won the Irish Derby four times as a rider, twice for Aidan O&rsquo;Brien, in 2009 on Fame and Glory and the following year on Cape Blanco.