Victoria Mboko, the 18-year-old Canadian tennis player, defeated champion Coco Gauff at the Canadian Open in Montreal on Saturday.

Canadian teenager Victoria Mboko earned the biggest win of her career on Saturday, beating top seed Coco Gauff 6-1 6-4 to reach the quarterfinals of the Canadian Open in Montreal. Mboko dropped her racket and covered her face in disbelief as the packed crowd leapt to their feet after the 18-year-old tournament wild card sealed the victory in just over an hour.

Canadian teenager Victoria Mboko upset top-seeded Coco Gauff 6-1, 6-4 on Saturday night to reach the National Bank Open quarterfinals.