An Saighdiur blitzed his rivals to land the Listed Cork Stakes for trainer Andrew Slattery.
The 12-1 chance travelled serenely at the head of affairs, and it was apparent a long way out that hot favourite Maarek, winner of the Prix de l'Abbaye last season, was in trouble.
An Saighdiur was pushed clear with a furlong to run and swept to victory, five lengths ahead of Scream Blue Murder in second and Remember You in third.
Maarek never really got going on his seasonal reappearance and had to settle for seventh.
Outlining the campaign ahead for his seven-year-old, Slattery said: "He got blocked in the Ayr Silver Cup last year, but the Ayr Gold Cup is definitely on the agenda now as he'll get in. He'll go to Royal Ascot if the ground is soft.
"There aren't many races before Royal Ascot for him, so he'll maybe go for the Paddy Power at the Curragh.
"He's a big galloping horse that wants soft ground. Jumping out and bowling along is the way to ride him.
"He's a fitter and better horse this year."