Rafael Nadal (ESP)  vs. Juan Martin Del Potro (ESP) 
Kevin Anderson (RSA)  vs Pablo Carreno Busta (ESP) . Both of these players are in their first ever major semifinal and they have the good fortune of facing each other so that one of them will make it to their first-ever major final. For both players, they know they are very unlikely ever to be in such a position again. So the result of the match will probably come down to who wants it more. That being said one cannot discount the matchup and so far it has been a good one for Anderson, who leads the head-to-head 2W-0L including in Cincinnati just a few weeks ago. Carreno Busta is currently the higher ranked player and is playing in his second major of the year where he has made a quarterfinal so he should have confidence but I think he still may be overwhelmed by the occasion. Usually in these situations the edge goes to the better mover and that would be Carreno Busta but I think Anderson's ability to hold his serve so easily and put the pressure back on his opponent will be deicisive. Mad Professah's pick: Anderson.