By surface
| Surface | Federico Juan Aguilar | Ralph Zepfel |
|---|---|---|
| Hard | 0 | 1 |
All meetings (1)
| Date | Tour | Tournament | Round | Surface | Winner | Set 1 | Set 2 | Set 3 | Set 4 | Set 5 |
|---|---|---|---|---|---|---|---|---|---|---|
| 1989-08-07 | WTA | Los Angeles | Round of 64 | Hard | Sandra Birch | 4-6 | 6-7 |
| Surface | Federico Juan Aguilar | Ralph Zepfel |
|---|---|---|
| Hard | 0 | 1 |
| Date | Tour | Tournament | Round | Surface | Winner | Set 1 | Set 2 | Set 3 | Set 4 | Set 5 |
|---|---|---|---|---|---|---|---|---|---|---|
| 1989-08-07 | WTA | Los Angeles | Round of 64 | Hard | Sandra Birch | 4-6 | 6-7 |