Arrogate, ridden by Mike Smith, won the $10 million Dubai World Cup on Saturday.
Gun Runner took second place and Neolithic came third of the 14 runners in the 2,000-metre contest.
The contest was the world’s richest horse race until being surpassed by Florida's $12 million Pegasus World Cup earlier this year.
Having taken over the mantle as the world's best racehorse from California Chrome, Arrogate was the favourite to win the Dubai World Cup that was last lifted by his illustrious American compatriot.
All eyes were on the four-year-old Arrogate, who lost on debut 11 months ago but hasn’t lost since.
He hass won the Breeders' Cup Classic and the inaugural $12 million Pegasus World Cup this year to stretch his unbeaten streak to six. In both races, Arrogate defeated Chrome, who won the Dubai World Cup last year at Meydan Racecourse by five lengths despite jockey Victor Espinoza hanging on to a loose saddle for most of it.
Under jockey Mike Smith, Arrogate has forged a winning combination in his last three Group 1 races: Travers Stakes, Breeders' Cup Classic, and Pegasus World Cup.