By surface
| Surface | Koji Watanabe | Yong Ho Chung |
|---|
All meetings (1)
| Date | Tour | Tournament | Round | Surface | Winner | Set 1 | Set 2 | Set 3 | Set 4 | Set 5 |
|---|---|---|---|---|---|---|---|---|---|---|
| 1968-03-23 | ATP | Davis Cup G2 SF: JPN vs KOR | Round Robin | — | Koji Watanabe | 6-1 | 6-1 | 6-4 |
| Surface | Koji Watanabe | Yong Ho Chung |
|---|
| Date | Tour | Tournament | Round | Surface | Winner | Set 1 | Set 2 | Set 3 | Set 4 | Set 5 |
|---|---|---|---|---|---|---|---|---|---|---|
| 1968-03-23 | ATP | Davis Cup G2 SF: JPN vs KOR | Round Robin | — | Koji Watanabe | 6-1 | 6-1 | 6-4 |