Kei Nishikori and Jack Sock practice【US OPEN 2016】 錦織圭の練習 全米オープン2016

Video of Kei Nishikori and Jack Sock practicing US OPEN 2016.

#tennis #KeiNishikori #nishikori #JackSock #UsOpen #NewYork #錦織圭 #錦織