By surface
| Surface | Tommy Haas | Marcos Ondruska |
|---|---|---|
| Hard | 1 | 0 |
All meetings (1)
| Date | Tour | Tournament | Round | Surface | Winner | Set 1 | Set 2 | Set 3 | Set 4 | Set 5 |
|---|---|---|---|---|---|---|---|---|---|---|
| 1998-08-03 | ATP | Canada Masters | Round of 64 | Hard | Tommy Haas | 6-2 | 6-3 |
| Surface | Tommy Haas | Marcos Ondruska |
|---|---|---|
| Hard | 1 | 0 |
| Date | Tour | Tournament | Round | Surface | Winner | Set 1 | Set 2 | Set 3 | Set 4 | Set 5 |
|---|---|---|---|---|---|---|---|---|---|---|
| 1998-08-03 | ATP | Canada Masters | Round of 64 | Hard | Tommy Haas | 6-2 | 6-3 |