It's not really an injury, maybe the better word would be knee problems, bcs he allrdy said that he's been feeling pain in his knees ever since USO and this year it got worse. That's the reason he didn't play any events since Nice and he hoped to be ready for the Olympics, but unfortunately that didn't happen.
I dont like Gael much but man, his career has been so screwed by injries
Get well soon Gael, its sad to see him unable to compete for France though he had very minuscule chances of a medal anyway. Still, get well soon!
"In my opinion he's the best player ever. When you play tennis, playing Federer is kind of a dream because you can see he does everything you would love to do on the court" - Fabrice Santoro