Novak Djokovic (SRB)  vs
Roger Federer (SUI)  vs Stan Wawrinka (SUI) . This should be the more compelling and emotionally resonant of the two major semifinals played. Things are always complicated when two players from the same country compete on the world stage and the dynamics between Federer and Wawrinka are in a transitional state. For almost a decade, Wawrinka has been looking up to Federer, not really believing he was his equal and but in the last 8 majors played Wawrinka has won twice and Federer has won none. Combined with the fact that in their last meeting Wawrinka essentially blasted Federer off the court at Roland Garros this year on his way to winning his 2nd major. It's hard to believe that Wawrinka can duplicate such a performance, especially on the hard courts of New York where Federer has won 5 times (although he has not been in a final here since losing to Juan Martin del Potro in 2009). That being said, if Donald Young could win a 6-1 set against Wawrinkain the 4th round then I am fairly confident that Federer will be able to beat even the new and improved Wawrinka, Mad Professah's pick: Federer.