Federer has to win everything after the US Open, just to stay afloat. I see this as being the deciding factor in whether he stays in the top 3 or whether we see changing of the guard with Murray emerging as the new 3rd member of the big 3. Federer can no longer live off his slam performances. Since winning the AO in 2010 Federer has made just one slam final (which he lost 6-1 in the 4th set). The indoor season has become Federer's only saving grace, and this will decide whether he stays with the big boys. Meanwhile the time seems right for Murray, now that he is getting some momentum vs Djokovic. How do you see Federer faring in the indoor season? Nothing but perfection will do.