Roger Federer pulls out of the Rogers Cup three weeks before the U.S. Open starts . The Swiss star was due to play in Montreal on Sunday but withdrew after suffering a back injury during his quarterfinal match against Argentina's Juan Martin Del Potro at Roland Garros. The U.S. Open marks Federer 's last chance to win a grand slam tournament in 2013 . Federer appeared to be headed in the right direction going into Wimbledon when he won his first title of 2013 in Halle , Germany on grass . As Federer skips the Rogers Cup , Rafael Nadal is set to make his return in Montreal .
Roger Federer pulls out of the Rogers Cup three weeks before the U.S. Open starts . The Swiss star was due to play in Montreal on Sunday but withdrew after suffering a back injury during his quarterfinal match against Argentina's Juan Martin Del Potro at Roland Garros. 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 .