Aleksander Mierzwinski defeated Maciej Domka 6-4 6-1 in the Poland F2 round of 32 on clay. The upset overturned the form book — Maciej Domka came in leading the head-to-head 1–0, but Aleksander Mierzwinski had been the form player, winning 2 of their last 6 on clay. Aleksander Mierzwinski claimed a first win over Maciej Domka in two meetings, narrowing the head-to-head to 1–1.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 1998-06-15 | Poland F1 | R32 | clay | Maciej Domka | 6-3 6-2 |