World no. 1, Novak Djokovic defeated Russian Nikolay Davydenko 7-5, 6-1 while earlier, Roger Federer defeated Vasek Pospisil of Canada 7-5, 6-3.
Djokovic is in near invincible form this season winning eight titles, and appeared suddenly vulnerable after a four week holiday, as the 30th ranked Russian recorded two early breaks to grab a 4-1 lead on the sluggish Serb.
The No. 3-ranked Swiss won the Rogers Cup in 2004 and 2006 and was the runner-up in 2007 and 2010.
Rafael Nadal is out at the Rogers Cup after a shocking 1-6, 7-6 (5), 7-6 (5) defeat in the second round against Croatia’s Ivan Dodig
Briton Andy Murray, the two-time defending champion in Canada, did not get his hard court season off to a promising start losing his opening match.