Here are my predictions for the women's quarterfinals at the US Open for 2017. Last year I correctly predicted 4 of 4 women's quarterfinals and correctly predicted 3 of 4 men's quarterfinals. This year I have also predicted the women's quarterfinals.
Rafael Nadal (ESP)  vs Andrey Rublev (RUS)
Roger Federer (SUI)  vs Juan Martin Del Potro (ESP) 
Sam Querrey (USA)  vs Kevin Anderson (RSA) . Sam Querrey is just going from strength to strength as he approaches nearly 30 years old. Many think of him as a smaller, lesser John Isner but Querrey is showing that he may be the more significant player in the end, having delivered two major upsets at Wimbledon in the last two years by defeating two defending champions (Djokovic in 2016 and Murray in 2017). Also, one round after Isner was dispatched by the serve-and-volley skill of Mischa Zverev, Querrey showed how one defeats such a tactic (with blazing passing shots). Honestly, Querrey's dismissal of Zverev in 77 minutes losing only 5 games was as close to being in the zone as we have seen this tournament and is probably the second best match of the tournament (behind Del Potro-Thiem). Anderson tends to play his best tennis in New York and these two play a very similar style of big man tennis which is basically reached its peak in the play of Marin Cilic. In these situations the edge goes to the better mover and that would be Querrey. Mad Professah's pick: Querrey.
Pablo Carreno Busta (ESP)  vs Diego Schwartzman (ARG)