David Klier defeated David Thurner 3-6 6-3 6-2 in the Germany F15 round of 32 on clay. The upset overturned the form book — David Thurner came in leading the head-to-head 1–0. David Klier claimed a first win over David Thurner in two meetings, narrowing the head-to-head to 1–1.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 2007-03-12 | Switzerland F3 | R32 | carpet | David Thurner | 7-5 6-1 |