The classy Aljamaaheer took advantage of a drop in class to open his account for the season in the Group Two Summer Mile at Ascot.
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The Roger Varian-trained four-year-old had been second in the Group One Queen Anne Stakes last time out and was sent off a 6/4 favourite to go one better here.
Confidently ridden by Paul Hanagan, the market-leader raced towards the rear while Godolphin's second string Famous Poet set the pace.
The winner steadily moved through the field and challenged down the outside in the home straight, alongside runner-up Mull Of Killough (7/1).
Hanagan's mount took a while to hit top gear but got going in the closing stages to hit the front inside the final furlong and secure a comfortable victory by a length, with Guest Of Honour (9/1) half a length further back.
Winning trainer Varian said: "He's run tremendous races at the highest level and you are always a bit nervous when you drop to Group Two and he is expected to win.
"He delivered today. It worked out well and we're really pleased.
"You can't say he doesn't get the mile well but he does have the speed to drop back to seven, if we want to go that route at some point.
"He's well entered-up and we can have a look. He's in the Lennox over seven, the Sussex over a mile, the Maurice de Gheest over six and a half, and the Jacques le Marois over a mile.
"It's very likely he'll take in one of those, but which one we'll have to see."