Thomas Strengberger S597 defeated Philipp Mullner 6-3 6-2 in the Austria F2 semi-final on clay. The upset overturned the form book — Philipp Mullner came in leading the head-to-head 1–0. Thomas Strengberger S597 claimed a first win over Philipp Mullner in two meetings, narrowing the head-to-head to 1–1.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 1998-11-14 | South Africa 2 Masters 2 | R32 | hard | Philipp Mullner | 6-1 7-6 |