Overview
- He announced in a social media post that he will end his career after this season and plans to keep competing through 2026.
- He said years of injuries have worn him down and that he has been "barely hanging on" physically.
- He is ranked No. 464 and is playing this year on the second-tier Challenger Tour rather than the main ATP circuit.
- He became the first Japanese man to reach a Grand Slam singles final at the 2014 US Open.
- He rose to a career-high No. 4, won 12 ATP titles, and earned the men’s singles bronze medal at the 2016 Rio Olympics.