Top seed Rafael Nadal blew past Benoit Paire 6-2 6-3 on Wednesday night to begin his quest for a fourth trophy at the Rogers Cup.
The world No 1 was untouchable in the second round as he schooled Paire for the fourth time, taking 74 minutes as he broke six times.
Nadal won the event in 2005, 2008 and 2013.
“I was not at my 100 per cent today,” Nadal said. “It’s true that I did good work here the last five days, but at the same time it’s true that I didn’t work very hard at home.
“So the first match is an important victory for me, for my confidence. It’s important that I have another match tomorrow too. So just try to keep going.
“I played a solid match, in the second set I had some troubles, but my return worked well. It was more about the mistakes from the baseline.”
The 32-year-old will bid for the quarter-finals here for the first time since 2015 when he plays Stan Wawrinka, who staged another fightback in three sets, beating Marton Fucsovics 1-6 7-6 7-6.
Defending champion Alexander Zverev, seeded second and winner at the weekend in Washington, also advanced easily beating Bradley Klahn 6-4 6-4.
Two generations of local players split the difference with Milos Raonic, 27, heading out while teenaged gun Denis Shapovalov moved on.
American Frances Tiafoe beat Raonic 7-6 4-6 6-1 in a match hit by a weather interruption of more than two and a half hours.
Teenage prodigy Shapovalov eliminated Fabio Fognini 6-3 7-5.