Piort Stefaniak defeated Konrad Mularczyk 7-6 6-4 in the Poland F1 q32 on hard. The upset overturned the form book — Konrad Mularczyk came in leading the head-to-head 1–0. Piort Stefaniak claimed a first win over Konrad Mularczyk in two meetings, narrowing the head-to-head to 1–1.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 2013-08-26 | Poland F5 | Q32 | clay | Konrad Mularczyk | 7-5 6-1 |