The favourite Roses In May put in a strong display to win the £3.2m Dubai World Cup, the world's richest race.
Owner Kenneth Ramsey celebrates Roses In May's success
The American horse, ridden by John Velazquez, did it the hard way after South African raider Yard-Arm set a strong early pace.
But once Roses In May showed his speed to take the lead after about 300m, the five-year-old looked set for success.
Even when Choctaw Nation challenged late, Roses In May found an extra gear to go on and win.
The fast-finishing Dynever edged out Choctaw Nation for second while British challenger Jack Sullivan looked impressive before fading late on and finishing fourth.
It was a fifth victory in 10 runnings of the race for American-trained horses and Roses In May's trainer Dale Romans was overjoyed with the success.
"It's the most exciting thing that has happened to me in a long time. I'm very proud," he said.
Jack Sullivan's trainer Gerard Butler was full of praise for his horse, who earned over £280,000 for his fourth place.
"Two and a half furlongs out I thought it was going to be our day, but he didn't stay the trip.
"He's a dirt horse and we won't be messing around with him on turf this season. His target will be the Breeders' Cup.
"If Lingfield were to put on a race on the sand for him, then we might use that as a trial, but I'd be happy going to Belmont without a run if we needed to.
"I'm so pleased for the owners and for Darryll, who gave him a brilliant ride."