By surface
| Surface | Earl Zinn | Johannes Helgo |
|---|---|---|
| Grass | 0 | 1 |
All meetings (1)
| Date | Tour | Tournament | Round | Surface | Winner | Set 1 | Set 2 | Set 3 | Set 4 | Set 5 |
|---|---|---|---|---|---|---|---|---|---|---|
| 1989-07-17 | WTA | Newport | Round of 16 | Grass | Hu Na | 1-6 | 4-6 |
| Surface | Earl Zinn | Johannes Helgo |
|---|---|---|
| Grass | 0 | 1 |
| Date | Tour | Tournament | Round | Surface | Winner | Set 1 | Set 2 | Set 3 | Set 4 | Set 5 |
|---|---|---|---|---|---|---|---|---|---|---|
| 1989-07-17 | WTA | Newport | Round of 16 | Grass | Hu Na | 1-6 | 4-6 |