InsideOut900
Legend
I am going with Nishikori in 3.
H2H meetings:
AO 2015: Stan wins 6-3 6-4 7-6
US Open 2014: Kei wins 3-6 7-5 7-6 6-7 6-4
Cincinatti 2012: Stan wins 6-3 6-3
Buenos Aires 2012:Stan wins 6-4 6-2
H2H meetings:
AO 2015: Stan wins 6-3 6-4 7-6
US Open 2014: Kei wins 3-6 7-5 7-6 6-7 6-4
Cincinatti 2012: Stan wins 6-3 6-3
Buenos Aires 2012:Stan wins 6-4 6-2