A Kei-O performance to remember. After being sidelined for 20 months, Kei Nishikori’s return to a match court was worth the agonizing wait. Out with a left hip injury that ultimately required ...

Osaka paid a beautiful tribute to fellow Japanese Nishikori, who is playing his final season in pro tennis.

Former world No. 4-ranked and 2014 U.S. Open finalist Kei Nishikori said on social media that he plans to retire at the end ...

Naomi Osaka hailed her 36-year-old compatriot as "inspirational" as he announced his intention to hang up his racquets.

Japanese tennis star Kei Nishikori was getting a little too much love off the court. The world’s No. 61 player is alleged to be having a years-long affair with model Azuki Oguchi by Japanese tabloid ...

Tennis star Kei Nishikori is speaking out amid cheating accusations. The Olympian, 35, addressed allegations that he had an affair with a model in a statement shared with the Japanese tabloid Shukan ...

Add Yahoo as a preferred source to see more of our stories on Google. Kei Nishikori returns the ball to Taylor Fritz during a quarterfinal match at the Atlanta Tennis Open at Atlantic Station, Friday, ...

Kei Nishikori, a professional Japanese tennis player, is number 35 on Forbes' World's Highest-Paid Athletes List with earnings of $37.3 million for 2019. 29-year-old Nishikori is currently ranked ...

TOKYO — Former world No. 4-ranked and 2014 U.S. Open finalist Kei Nishikori said Thursday on social media that he plans to retire at the end of this tennis season. The 36-year-old Nishikori missed the ...