2015 W and USO are his last chances of winning a grand slam. He's going on 34 on 8/8 and time has truly run out. I'm willing to concede defeat on this one. Also 2016 Olympics are definitely his last chance of winning Olympics singles gold. Even for Rafa, Djokovic, and Mugray time will run out before you know it. Rogie can still win some masters series events, 500 events, and also 250 events, but that's it now. I'm not even convinced he'll win another World Tour Finals title. He's still good enough to be a top 5 player for sure (2-5 really), but his days as the top player are truly over. It's been a heck of a run for Roger Federer throughout his entire career, but it's getting closer to retirement time and I'm fully convinced 2016 will be his last year.