By surface
| Surface | Ulrich Trettin | Viorel Marcu |
|---|
All meetings (1)
| Date | Tour | Tournament | Round | Surface | Winner | Set 1 | Set 2 | Set 3 | Set 4 | Set 5 |
|---|---|---|---|---|---|---|---|---|---|---|
| 1968-09-08 | ATP | Mamaia | Round of 16 | — | Viorel Marcu | 1-6 | 0-6 |
| Surface | Ulrich Trettin | Viorel Marcu |
|---|
| Date | Tour | Tournament | Round | Surface | Winner | Set 1 | Set 2 | Set 3 | Set 4 | Set 5 |
|---|---|---|---|---|---|---|---|---|---|---|
| 1968-09-08 | ATP | Mamaia | Round of 16 | — | Viorel Marcu | 1-6 | 0-6 |