War Envoy powered home to land the Britannia Stakes at Royal Ascot under Ryan Moore.
Remarkably an eighth winner of the week and the third on the afternoon for the jockey, Aidan O'Brien's charge was enjoying a significant drop in class having had his last three runs in the Craven Stakes, the French 2000 Guineas and the French Derby.
The War Front colt (10-1) was held up for a late run in the smaller group racing on the far side of the track and Moore timed his run to perfection, getting up to beat Udododontu by a neck.
Sacrificial fared best of those that raced against the stands rail in third, with Carry On Deryck fourth.
Moore, who had a luckless run in the Gold Cup on Kingfisher, said: "It was a bit tricky. I was hoping they wouldn't split as uneven as that and there wasn't as many horses as I would have liked (on the far side).
"They got well strung out, but fortunately we had the speed on our side, they got racing a long way out and I just kept waiting and fortunately didn't find traffic this time.
"He's a miler and loves fast ground and loves a strong pace. When he's running in those Group races it doesn't always unfold that way, but he's got plenty of ability."
O'Brien said: "I'm delighted. We probably did all the wrong things with him, running him in soft ground and over a mile and quarter. It took us a good while to learn what way to ride him.
"Obviously a mile on fast ground and taking our time on him (suits) and Ryan gave him an absolute peach of a ride.
"What can I say about Ryan? He's a marvellous jockey, probably the greatest jockey I've ever seen. He's a total professional and fully committed. He has great feel about a horse and great feel about a race.
"He's an absolute gentleman to work with and always has been. We've worked with him very closely for the last three years and we're privileged he's riding for us."