Heather Watson progressed to the second round of the Rogers Cup in Toronto after beating American Irina Falconi.
The British number one, 23, came through with ease to win 6-1 6-2.
Fellow Briton and world number three Andy Murray was rained off at 4-4 against Spaniard Tommy Robredo in the second round in Montreal - Wednesday's play resumes at 17:30 BST.
There were wins for top seeds Novak Djokovic and Serena Williams, but Canadian Eugenie Bouchard went out.
Bouchard, Wimbledon finalist in 2014, was beaten 6-0 5-7 6-2 by Swiss teenager Belinda Bencic.