Dhaka, Aug. 4 -- Canadian teenager Victoria Mboko took down top-seeded American Coco Gauff 6-1, 6-4 on Saturday, thrilling the home crowd as she reached the quarter-finals of the WTA 1000 tournament in Montreal.

The 18-year-old wild card saved all four break points she faced, and broke reigning French Open champion Gauff three times on the way to a comprehensive victory in just 62 minutes.

"I don't even know what to say still, I was kind of shocked about it all," said Mboko, adding that the support of the home crowd had buoyed her late in the second set.

"I just remember in the last game when I was up 5-4, the crowd kind of started cheering even louder, and everything got super noisy," she said. "I kind of used that as more fuel for my...