Head to head
Rivalry summary
Koji Watanabe and Charles Chang met 1 times on the ATP tour between 1972 and 1972. Koji Watanabe leads the head-to-head 1–0 against Charles Chang.
1
Hard
0
Koji Watanabe's wins on the left · Charles Chang's on the right · bar lengths share one scale
All meetings (1)
| 1972 | Hong Kong | Hard | R32 | Koji Watanabe | 6-3 6-0 |
Methodology
Head-to-head totals and surface splits exclude walkovers (no match was played), which follows ATP convention — walkover meetings still appear in the match list. The momentum chart plots the running lead across all counted meetings, oldest to newest.