By surface
| Surface | Ramanathan Krishnan | Koji Watanabe |
|---|
All meetings (1)
| Date | Tour | Tournament | Round | Surface | Winner | Set 1 | Set 2 | Set 3 | Set 4 | Set 5 |
|---|---|---|---|---|---|---|---|---|---|---|
| 1968-09-21 | ATP | Davis Cup EUR F: JPN vs IND | Round Robin | — | Ramanathan Krishnan | 6-2 | 3-6 | 6-3 | 6-2 |
| Surface | Ramanathan Krishnan | Koji Watanabe |
|---|
| Date | Tour | Tournament | Round | Surface | Winner | Set 1 | Set 2 | Set 3 | Set 4 | Set 5 |
|---|---|---|---|---|---|---|---|---|---|---|
| 1968-09-21 | ATP | Davis Cup EUR F: JPN vs IND | Round Robin | — | Ramanathan Krishnan | 6-2 | 3-6 | 6-3 | 6-2 |