By surface
| Surface | Heinz Gunthardt | Willem Prinsloo |
|---|---|---|
| Hard | 1 | 0 |
All meetings (1)
| Date | Tour | Tournament | Round | Surface | Winner | Set 1 | Set 2 | Set 3 | Set 4 | Set 5 |
|---|---|---|---|---|---|---|---|---|---|---|
| 1979-04-16 | ATP | Johannesburg | Round of 16 | Hard | Heinz Gunthardt | 3-6 | 6-2 | 6-2 |
| Surface | Heinz Gunthardt | Willem Prinsloo |
|---|---|---|
| Hard | 1 | 0 |
| Date | Tour | Tournament | Round | Surface | Winner | Set 1 | Set 2 | Set 3 | Set 4 | Set 5 |
|---|---|---|---|---|---|---|---|---|---|---|
| 1979-04-16 | ATP | Johannesburg | Round of 16 | Hard | Heinz Gunthardt | 3-6 | 6-2 | 6-2 |