Kei Nishikori & Diego Schwartzman hit the practice court ahead of the US Open. Tags: 31 comments 1294 likes 47 shares Share this: Kei Nishikori About author not provided Welcome to the Official Fan Page of Kei Nishikori on Facebook! www.keinishikori.com & www.keisapp.co 762954 followers 680630 likes "http://www.keisapp.com/" View all posts