Novak Djokovic showed no sign of rust in his first competitive match since Wimbledon, brushing aside Florian Mayer 6-2 6-1 at the ATP Rogers Cup.
The top seed - who lost out in the final at SW19 to Andy Murray - triumphed in just 55 minutes in Montreal to cruise into the third round and stretch his winning run in the Masters event to 11 matches.
Djokovic converted on four of seven break-point opportunities that came his way before battling back from 0-40 down in the final game.
"As the match went on, I felt more comfortable on the court," the Serbian, champion in 2011 and 2012, told atpworldtour.com.
"That's something that makes me happy. Obviously to win the first match after four weeks, first match on hard courts since Miami basically this year, it's been more than a few months.
"In order to play that well, I have to keep up and practise tomorrow, so I'm confident I can continue on."
Murray, meanwhile, will begin his campaign in Canada on Wednesday against Marcel Granollers, the Spaniard having set up the meeting with a 6-4 6-4 win over Bulgaria's Grigor Dimitrov.
There were some early casualties amongst the seeds in action on Tuesday; Czech Radek Stepanek overcame the 12th-ranked Spaniard Nicolas Almagro 6-3 6-7 (4/7) 6-3, while Russia's Nikolay Davydenko battled for a 2-6 6-1 6-1 success against 14th seed Gilles Simon of France.
Seventh seed Richard Gasquet of France - twice a finalist in the tournament - beat Slovakia's Martin Klizan 6-3 6-2 and Tommy Haas, the 10th seed from Germany, advanced with a 7-6 (7/4) 6-3 victory over Belgian David Goffin.
Japanese ninth seed Kei Nishikori ousted Italy's Andreas Seppi 4-6 7-5 6-1 and 11th seed Milos Raonic of Canada eliminated Frenchman Jeremy Chardy 6-3 4-6 7-5.
In-form Italian Fabio Fognini bounced back from a first-set disaster against Marcos Baghdatis to defeat the Cypriot 1-6 6-1 6-1.
Jerzy Janowicz, the 15th seed from Poland, also had to come from a set down to get the better of Frenchman Julien Benneteau by a 3-6 6-3 7-5 scoreline.
Wild card Jaroslav Pospisil edged two tie-breaks to topple big-serving American John Isner 5-7 7-6 (7/5) 7-6 (7/4), while fellow Canadians Frank Dancevic and Filip Peliwo also progressed with wins over Chinese Taipei's Yen-Hsun Lu and Finland's Jarkko Nieminen, who retired hurt, respectively.
With Jesse Levine having already won on Monday, Tuesday's results meant there will be a record five Canadian players reached the second round.