By surface
| Surface | Heinz Gunthardt | Zoltan Ilin |
|---|---|---|
| Clay | 1 | 0 |
All meetings (2)
| Date | Tour | Tournament | Round | Surface | Winner | Set 1 | Set 2 | Set 3 | Set 4 | Set 5 |
|---|---|---|---|---|---|---|---|---|---|---|
| 1979-05-21 | ATP | Rome | Round of 64 | Clay | Heinz Gunthardt | 6-1 | 6-4 | |||
| 1979-03-16 | ATP | Davis Cup EUR PR: SUI vs YUG | Round Robin | — | Heinz Gunthardt | 6-4 | 6-0 | 6-2 |