Japan's fifth-ranked Kei Nishikori made history by reaching last year's US Open final and he feels stronger, smarter and more confident as he begins the quest to repeat the feat (AFP Photo/Kenzo ... more 
Japan's fifth-ranked Kei Nishikori made history by reaching last year's US Open final and he feels stronger, smarter and more confident as he begins the quest to repeat the feat (AFP Photo/Kenzo Tribouillard) less 
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AFP | Photo By Kenzo Tribouillard / AFP/File
Mon, Aug 3, 2015 5:52 PM EDT