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By surface
| Surface | Stephan Koenigsfest | Riccardo Roberto |
|---|
| Hard |
2 |
0 |
| Clay |
1 |
0 |
| Carpet |
0 |
1 |
All meetings (4)
| Date | Tour | Tournament | Round | Surface | Winner |
Set 1 | Set 2 | Set 3 | Set 4 | Set 5 |
| 1981-07-13 |
WTA |
Kitzbuhel |
Round of 16 |
Clay |
Yvonne Vermaak |
4-6 |
4-6 |
|
|
|
| 1978-08-14 |
WTA |
Toronto |
Round of 32 |
Hard |
Yvonne Vermaak |
6-2 |
2-6 |
0-6 |
|
|
| 1978-01-09 |
WTA |
Hollywood |
Round of 32 |
Carpet |
Renata Tomanova |
6-7 |
3-6 |
|
|
|
| 1976-01-26 |
WTA |
McAllen Futures |
Round of 32 |
Hard |
Yvonne Vermaak |
6-7 |
3-6 |
|
|
|