Low Sun saw off stablemate Uradel to provide Willie Mullins with a one-two in the Dubai £500,000 (€567,000) Cesarewitch Stakes at Newmarket.
Ireland's perennial champion National Hunt trainer saddled no less than seven runners in the prestigious staying handicap, with long-time ante-post favourite Stratum and Cheltenham Festival heroine Limini spearheading the formidable team.
As the field approached the final half-mile of the two-mile-two-furlong contest, the Ian Williams-trained Stars Over The Sea and Paul Nicholls' Cliffs Of Dover led the 33 runners, but faded away as Low Sun and Seamie Heffernan hit the front.
Uradel was travelling noticeably well in behind in the hands of Billy Lee and the pair drew clear entering the final furlong.
Uradel did his best to get on terms, but with the rail to help, Low Sun dug deep to win the battle by a neck.
Cleonte was third with Vis A Vis fourth.
The heavily backed 4-1 favourite Southern France never threatened to land a telling blow.