See main article: 2009 Rogers Cup.
Andy Murray defeated Juan Martín del Potro in the final, 6–7(4–7), 7–6(7–3), 6–1 to win the men's singles tennis title at the 2009 Canadian Open.
Rafael Nadal was the defending champion, but lost in the quarterfinals to del Potro.
This was first time since 1973 on the ATP Tour that all of the top eight ranked players advanced to the quarterfinals of a single tournament.[1]
The top eight seeds received a bye into the second round. All of them reached quarter-finals.