Galileo Gold ran out an emphatic winner of the Qipco 2000 Guineas for Frankie Dettori and Hugo Palmer at Newmarket.
Prominent throughout, the Al Shaqab-owned colt streaked clear going into the dip and beat Massaat by a length and a half at odds of 14-1.
Ribchester defied his price of 33-1 to finish third, beaten two lengths.
Hot favourite Air Force Blue was in trouble early and finished in the rear.
It was a third win in the Classic for Dettori, a mere 20 years on from his first success on Mark Of Esteem.
The rider crossed over from the centre of the track to bag the rail once clear and he never looked like being caught.
Massaat, second to Air Force Blue in the Dewhurst, ran a blinder for first-season trainer Owen Burrows with Ribchester flying the flag for Richard Fahey and the north in third.
The race was supposed to revolve around last year's champion juvenile Air Force Blue, but Ryan Moore never looked particularly happy while another major disappointment was Racing Post Trophy winner Marcel.