British number one Johanna Konta reached the third round of the Rogers Cup with a 7-5 6-1 win over American qualifier Vania King in Montreal.
The 25-year-old, who claimed her first WTA Tour title in California on Sunday, won in 74 minutes.
The world number 14 will play American Varvara Lepchenko in the next round.
Lepchenko, 30, beat Britain's Naomi Broady in round two, having re-entered as a lucky loser after Garbine Muguruza withdrew with illness.
Germany's Angelique Kerber, the highest ranked player in the draw following the withdrawal of Serena Williams, beat Croatian Mirjana Lucic-Baroni 6-3 4-6 6-3.
Polish fourth seed Agnieszka Radwanska beat Monica Niculescu of Romania 6-1 7-5, and home favourite Eugenie Bouchard of Canada was impressive in a 6-2 6-0 win over Slovakian 11th seed Dominika Cibulkova.
Djokovic back to winning ways
World number one Novak Djokovic returned to action for the first time since his shock third-round defeat at Wimbledon with a 7-5 7-6 (7-3) win over Luxembourg's Gilles Muller at the men's Rogers Cup in Toronto.
"It's tough playing the first hard-court match since March," said the Serb, a three-time champion in Canada.
"It was hot and that made the ball move very fast. It was hard to control, it was not easy to play. But I managed to stay tough."
Canadian 17-year-old Denis Shapovalov, who beat Nick Kyrgios in round one, went down 6-4 6-3 to Bulgaria's Grigor Dimitrov.
There was better news for the home crowd as fourth seed and Wimbledon finalist Milos Raonic beat Lu Yen-Hsun 6-3 6-3.