Montassib ran out a shock 25-1 winner of the Betfair Sprint Cup at Haydock.
Trained by William Haggas and ridden by Cieren Fallon, the six-year-old had been off the track since winning the Group Three Chipchase Stakes at Newcastle in June.
However, he shrugged off that lengthy absence in style, coming from well off the pace to grab Group One glory from the James Fanshawe-trained Kind Of Blue.
Fellow Haggas inmate Unequal Love kept on to take third, with 50-1 shot Vadream edged into fourth.
A jubilant Fallon said: “What a performance, he’s a horse you have to have confidence in and take your time. He’s done nothing but improve and I’m very lucky to keep on him.
“To ride a Group One for Mr Haggas and Maureen (Haggas), I wouldn’t be in the position I’m in today without them.”