Roger Federer reveals back troubles

Roger Federer has revealed that he could miss the upcoming Rogers Cup in Montreal as he struggles with an ongoing back problem.

The 31-year-old recently suffered his third-straight defeat to a player ranked outside the world's top 50 when he lost in the first round of the Swiss Open to Daniel Brands.

"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.