May 1 : Kei Nishikori will hang up his racquet at the end of the 2026 season, the 36-year-old said on Friday, bringing down the curtain on a professional career that saw him break new ground for Japanese tennis. Nishikori became the first Japanese player to reach a Grand Slam singles final at the 2014 U.S. Open and was the second Asian man after Thailand's Paradorn Srichaphan to make it into the top 10. He reached a career-high ranking of number four in 2015 and won 12 titles on the ATP Tour,