By surface
| Surface | Tommy Haas | Kristof Vliegen |
|---|---|---|
| Clay | 2 | 0 |
All meetings (2)
| Date | Tour | Tournament | Round | Surface | Winner | Set 1 | Set 2 | Set 3 | Set 4 | Set 5 |
|---|---|---|---|---|---|---|---|---|---|---|
| 2007-04-06 | ATP | Davis Cup WG QF: BEL vs GER | Round Robin | Clay | Tommy Haas | 6-74 | 7-5 | 6-4 | 6-2 | |
| 2005-04-18 | ATP | Houston | Round of 32 | Clay | Tommy Haas | 6-3 | 7-5 |