Andrzej Mach defeated Kacper Owsian 4-6 6-1 6-0 in the Poland F5 round of 32 on clay. The upset overturned the form book — Kacper Owsian came in leading the head-to-head 1–0. Andrzej Mach claimed a first win over Kacper Owsian in two meetings, narrowing the head-to-head to 1–1.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 2007-08-20 | Poland F7 | R16 | clay | Kacper Owsian | 1-6 7-5 6-4 |