Andy Murray returned to tennis with a 6-4 7-6 (7-2) win in the Rogers Cup over Marcel Granoller's.
Granoller's serve was twice broken by Murray in the first, causing him to go down 4-1.
He managed to come back after a run of unforced errors to bring the score to 5-4, but Murray served out the set before taking the second set after a tie-break.
In his first match since winning the Wimbledon final against Novak Djokovic, the world number two extended his string of unbeaten games to 13.
The 26-year-old hasn't lost now since a back injury forced him to pull out of the Rome Masters.
Murray will now face world number 38 Ernests Gulbis in the next round, and will hope to iron out the unforced errors that seemed to plague him in his contest with Granoller.
Although clearly still in good form, Murray blamed the conditions for the infrequent occasions when he wasn't at his best.
"It was tricky. It is extremely windy here and the balls here are quick so it felt like it was flying around," the Scot said.
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