By surface
| Surface | Onny Parun | Dennis Ralston |
|---|---|---|
| Clay | 0 | 1 |
All meetings (1)
| Date | Tour | Tournament | Round | Surface | Winner | Set 1 | Set 2 | Set 3 | Set 4 | Set 5 |
|---|---|---|---|---|---|---|---|---|---|---|
| 1971-07-17 | ATP | Washington WCT | Round of 32 | Clay | Dennis Ralston | 6-7 | 2-6 |
| Surface | Onny Parun | Dennis Ralston |
|---|---|---|
| Clay | 0 | 1 |
| Date | Tour | Tournament | Round | Surface | Winner | Set 1 | Set 2 | Set 3 | Set 4 | Set 5 |
|---|---|---|---|---|---|---|---|---|---|---|
| 1971-07-17 | ATP | Washington WCT | Round of 32 | Clay | Dennis Ralston | 6-7 | 2-6 |