Kei Nishikori

Kei Nishikori is a Japanese professional tennis player. He is the second male Japanese player to have been ranked in the top 5 in singles, and the only one to do so in the Open Era. Nishikori first reached his career-high singles ranking of world No. 4 in March 2015. He is currently ranked world No. 54 by the Association of Tennis Professionals (ATP).