Roger Taylor pulls out of the Rogers Cup three days before the U.S. Open starts . Federer has been suffering from a back injury and almost pulled out of a tournament last week . The U.S. Open marks Federer 's last chance to win a grand slam tournament in Canada . As Federer leaves the Rogers Cup , Rafael Nadal is set to make his debut in Montreal .
Roger Federer pulls out of the Rogers Cup three weeks before the U.S. Open starts . Federer has been suffering from a back injury and almost pulled out of a tournament last week . The U.S. Open marks Federer 's last chance to win a grand slam tournament in 2013 . As Federer skips the Rogers Cup , Rafael Nadal is set to make his return in Montreal .