Koji Watanabe has found the Tour difficult, recording 19–24 across 43 matches (44.2%). The numbers point to a player still building their Tour presence — a key area of opportunity going forward.
At Grand Slam level (Australian Open, Roland Garros, Wimbledon, US Open): Koji Watanabe has struggled at Grand Slam level: 1–6 (14.3%) in 7 matches. The best-of-five format and elite fields make this the toughest benchmark on Tour.
By format — best-of-five: 11–15 (42.3%); best-of-three: 8–9 (47.1%). Slightly stronger in three-set contests, though the five-set record is still respectable.
Best season: 1968 — 9–6 (60.0%) from 15 matches. The best single-season display to date — a useful reference point as the career continues to develop.