Thomas Holzer defeated Bastian Gronefeld 6-4 6-1 in the Germany F13 round of 32 on clay. The upset overturned the form book — Bastian Gronefeld came in leading the head-to-head 1–0, but Thomas Holzer had been the form player, winning 5 of their last 7 on clay. Thomas Holzer claimed a first win over Bastian Gronefeld in two meetings, narrowing the head-to-head to 1–1.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 2004-07-12 | Austria F2 | R32 | clay | Bastian Gronefeld | 6-7(5) 6-2 6-3 |