Rafael Nadal will become world number one if he progresses to the semi-finals in Canada
Rafael Nadal and Roger Federer both won their opening matches at the Rogers Cup in Montreal.
Top seed Nadal, 31, who will claim the world number one spot from Andy Murray if he reaches the semi-finals in Canada, beat Borna Coric 6-1 6-2.
Murray pulled out of the competition with a hip injury, which has also ruled him out of the Cincinnati Masters.
Federer, playing in his first match since winning the Wimbledon title, beat Peter Polansky 6-2 6-1 in 53 minutes.
Nadal, a three-time champion in Canada, took 71 minutes to beat 20-year-old Croat Coric, facing just one break point in the match.
Roger Federer held match points in the only two matches he has lost this year
The Spaniard meets Denis Shapovalov next – the Canadian who was disqualified from his Davis Cup match against Great Britain in February for hitting the umpire in the face with the ball.
Another Canadian, sixth seed Milos Raonic, who could have played Nadal in the last eight, lost 6-4 6-4 to unseeded Frenchman Adrian Mannarino.
By: Patrick Hangue