Konrad Mularczyk defeated Piort Stefaniak 7-5 6-1 in the Poland F5 q32 on clay. The upset overturned the form book — Piort Stefaniak came in leading the head-to-head 1–0. Konrad Mularczyk claimed a first win over Piort Stefaniak in two meetings, narrowing the head-to-head to 1–1.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 2013-07-29 | Poland F1 | Q32 | hard | Piort Stefaniak | 7-6(2) 6-4 |