Irish raider Haatef landed an exciting renewal of the John Guest Diadem Stakes at Ascot.
Ridden by Richard Hills, Kevin Prendergast's charge held off the determined effort of Dark Missile to score at odds of 8-1.
Assertive, trained by Richard Hannon and ridden by Dane O'Neill, was third.
It was the first time Hills had sat on Haatef but that proved no hindrance against this impressive victory.
'I watched him in the Guineas and I know he was really fancied in that,' the jockey told BBC Sport.
'Kevin said the cut in the ground would help and to take your time with him.
'We had our luck because the speed was on the outside, and that also helped.
'He's showed he's going to be a good sprinter and I'd stay there (at that distance).'
