Kei Nishikori, the former US Open finalist, has announced that he will retire at the conclusion of the 2026 season. This decision comes as part of a broader trend, as several notable players, including Stan Wawrinka, Gael Monfils, and David Goffin, are also set to leave the sport this year. Nishikori's career has been marked by significant achievements, but he now faces the reality of stepping away from competitive tennis. In his statement, he expressed a sense of acceptance, saying, 'I have to be happy,' indicating a focus on his well-being as he prepares for this next chapter in his life.