By surface
| Surface | Tommy Haas | Mark Merklein |
|---|---|---|
| Hard | 1 | 1 |
All meetings (2)
| Date | Tour | Tournament | Round | Surface | Winner | Set 1 | Set 2 | Set 3 | Set 4 | Set 5 |
|---|---|---|---|---|---|---|---|---|---|---|
| 1997-08-11 | ATP | Indianapolis | Round of 64 | Hard | Mark Merklein | 6-3 | 1-6 | 3-6 | ||
| 1997-07-14 | ATP | Washington | Round of 32 | Hard | Tommy Haas | 6-4 | 2-6 | 6-3 |