Roger Federer has revealed that he could miss the upcoming Rogers Cup in Montreal as he struggles with an ongoing back problem.
"I've had serious problems with the back; I had to get some anti-inflammatories last week in Hamburg due to the pain," Tennis.com quotes the world number five as saying.
"I will have to do a lot of exercises and see how it all feels. My main priority now is to fix my back. I would love to be able to train at 100%.
"I'll have to see if the rehab is enough to let me play in Montreal. If it is, I'll go; if not, then it gives me another week."
The Rogers Cup gets underway on August 5.