For this year I think Nadal wins FO, Novak Wimbldon and Murray USO... Going forward I don't know where Federer picks up another GS. I could see 2014 being the year of Murray, finally getting an AO, winning wimbledon and possibly another USO. Can't really say what Nadal will do and who knows if a younger player will become a legit threat.
Nadal and Agassi superfan
Volkl PB 10 all black