British number one Johanna Konta reached the Rogers Cup quarter-finals with a 6-3 6-2 win over American Varvara Lepchenko in Montreal.
The world number 14, who claimed her first WTA Tour title in California on Sunday, won in 67 minutes.
Konta, 25, will face Kristina Kucova, 26, for a place in the semi-finals, after the Slovak beat Montreal-born Eugenie Bouchard 3-6 6-4 6-3.
World number six Venus Williams lost to fellow American Madison Keys.
Williams, 36, who was beaten by Konta in the final of the Stanford Classic at the weekend, went down 6-1 6-7 (2-7) 6-3.
Djokovic and Raonic progress
World number one Novak Djokovic eased into the quarter-finals after a 6-2 6-4 win over Czech qualifier Radek Stepanek as the top five men's seeds progressed.
Serb Djokovic will now face world number eight Tomas Berdych.
Milos Raonic, this year's beaten Wimbledon finalist, was also untroubled in the third round with a comfortable 6-2 6-3 win over 19-year-old American Jared Donaldson.
World number 14 Gael Monfils is the Canadian's quarter-final opponent after the Frenchman edged out Belgian David Goffin 7-6 (7-5) 2-6 6-4.