Matthias Muller defeated Ronald Dueller 6-2 6-4 in the Austria 2 Masters 3 round of 32 on clay. The upset overturned the form book — Ronald Dueller came in leading the head-to-head 1–0, but Matthias Muller had been the form player, winning 1 of their last 5 on clay. Matthias Muller claimed a first win over Ronald Dueller in two meetings, narrowing the head-to-head to 1–1.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 1999-07-26 | Egypt F1 | SF | clay | Ronald Dueller | 6-4 7-6 |