By surface
| Surface | Constantin Frantzen | Gaston Tonello |
|---|---|---|
| Hard | 2 | 0 |
All meetings (2)
| Date | Tour | Tournament | Round | Surface | Winner | Set 1 | Set 2 | Set 3 | Set 4 | Set 5 |
|---|---|---|---|---|---|---|---|---|---|---|
| 1989-11-06 | WTA | Nashville | Round of 16 | Hard | Manon Bollegraf | 4-6 | 4-6 | |||
| 1989-02-20 | WTA | Wichita | Round of 32 | Hard | Manon Bollegraf | 2-6 | 4-6 |