Paul Hanagan rode Mukhadram to victory in the Coral-Eclipse Stakes at Sandown.
The five-year-old (14-1) pulled clear in the final two furlongs to beat last year's Irish Derby winner Trading Leather (12-1) into second, with 100-1 outsider Somewhat third.
"We went a nice gallop and it just suited perfectly," said Hanagan.
"If there is a horse that deserves that, it's him. He's been second in the Dubai World Cup and could have been second in this last year.
"Everyone at the yard has done a fantastic job. I'm chuffed to bits."