Canadian teen Mboko stuns top-seeded Gauff to reach Montreal quarter-finals, Zverev and Popyrin advance

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 quarterfinals of the WTA I000 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.

Mboko started the season ranked 333rd in the world and has worked her way up to 85 but the win over Gauff -- who she took to three sets in Rome in May -- is the biggest win of her career.

"Playing Coco is obviously never easy. She's number two in the world, and it has been such a great opportunity for me to play against someone like her," Mboko said. "I was just happy I kept my composure today and I pulled it through."

Gauff, who had a combined 37 double faults as she struggled through her first two matches, was caught flatfooted as the Canadian teen raced through the first set in 25 minutes.

Gauff buckled down in the second, but she was unable to convert three break chances in the seventh game-- coming up short on a drop shot and smacking a forehand into the net on the first two.