Creachadoir gave the Godolphin operation their first Group One victory of the season as he powered home in the Juddmonte Lockinge Stakes at Newbury.
Frankie Dettori was away well on the favourite but Rob Roy made the running.
The leader tracked across to the stands-side rails but when he tried to kick on there was nothing there.
Creachadoir hit the front with two furlongs to run and held off challenges from Phoenix Tower and the fast finishing Tariq, with Cesare fourth.
Dettori said the race went to plan, although he added that Creachadoir "was idling a little bit in front".
"Hopefully this race will help him to settle down a little bit as he was very fresh beforehand"
"His form is rock-solid and he is a force to be reckoned with this year," added the jockey.
"I had the box seat and managed to get some room at the two. I pressed go and he responded immediately."
Trainer Saeed bin Suroor, who bagged the race three times in succession from 1998 to 2000, said: "He is a stronger horse than last year and had been working very well.
"There is no plan, but we may take him to Ascot.
"Hopefully this race will help him to settle down a little bit as he was very fresh beforehand."
Juddmonte Lockinge Stakes (Newbury)
1. Creachadoir (L Dettori 3-1
2. Phoenix Tower (T E Durcan) 9-2
3. Tariq 9-1 (J Fortune)
11 ran
Distances: ¾ length; neck
~RS~q~RS~~RS~z~RS~36~RS~)