Leylah Fernandez, the 15-year-old from Laval, and Rebecca Marino, from British Columbia, survived the first of two qualifying rounds leading to the main draw of Rogers Cup presented by National Bank.
It took Fernandez 63 minutes to dispose of Alicja Rosolska of Poland, who entered as an alternate, in two sets (6-3, 6-2). On Sunday, the Canadian will meet up with No.188 Katie Boulter of Great Britain.
Marino overpowered Vera Lapko (13) of Belarus in three sets (3-6, 6-3, 6-3) and now faces No.53 Qiang Wang (5) of China in the final round.
The other Canadians in action fought hard but ultimately came up short.
Alexandra Vagramov resisted for three sets but fell to Sofia Kenin (12) of the US (5-7, 6-4, 6-2).
Katherine Sebov lost to Lucie Safarova of the Czech Republic (6-4, 7-6 (4)) after taking the lead 4-1 in the first set. Carson Branstine was baffled by Monica Puig (10) of Puerto Rico in two sets (6-3, 6-3), and Gabriela Dabrowski was no match for Bernarda Pera of the US (6-1, 6-2). Catherine Leduc was beaten in two identical sets (6-2, 6-2) by Dalila Jakupovic of Slovenia. Finally, Isabelle Boulais was sent home by Sachia Vickery of the US (6-2, 6-1).
The last qualifying round to determine the 12 players who will enter the main draw continues on Sunday.