One Ruler is SW190 and the 126th Group winner for Dubawi winning the Gr3 Autumn Stakes (7f) at Newmarket.
Settled just behind the early speed, One Ruler was asked to quicken two furlongs out and he ran to the lead, staying on well to defeat Van Gogh (American Pharoah) by 1-3/4 lengths with Dhahabi (Frankel) in third.
Godolphin-homebred One Ruler has now won two and his four starts, placing in the other two including third in the Listed Flying Scotsman Stakes at Doncaster.
He is the first winner for Gr3 Prix de Sandringham at Chantilly winner and Gr1 Sun Chariot Stakes at Newmarket third Fintry (Shamardal), a half-sister to Gr2 Daniel Wildenstein at Longchamp runner-up Lochinver (Kingmambo).
The granddam Campsie Fells (Indian Ridge) won the Gr3 Prix Vanteaux at Longchamp and finished third in the Gr1 Garden City Handicap at Belmont Park.