By surface
| Surface | Johannes Helgo | Sergey Volkov |
|---|---|---|
| Hard | 1 | 0 |
All meetings (1)
| Date | Tour | Tournament | Round | Surface | Winner | Set 1 | Set 2 | Set 3 | Set 4 | Set 5 |
|---|---|---|---|---|---|---|---|---|---|---|
| 1986-03-24 | WTA | Phoenix | Round of 32 | Hard | Hu Na | 7-6 | 6-7 | 3-6 |
| Surface | Johannes Helgo | Sergey Volkov |
|---|---|---|
| Hard | 1 | 0 |
| Date | Tour | Tournament | Round | Surface | Winner | Set 1 | Set 2 | Set 3 | Set 4 | Set 5 |
|---|---|---|---|---|---|---|---|---|---|---|
| 1986-03-24 | WTA | Phoenix | Round of 32 | Hard | Hu Na | 7-6 | 6-7 | 3-6 |