Jan Satral defeated Piotr Grynkowski 6-4 6-2 in the M15 Trnava 1 round of 32 on hard. The upset overturned the form book — Piotr Grynkowski came in leading the head-to-head 1–0. Jan Satral claimed a first win over Piotr Grynkowski in two meetings, narrowing the head-to-head to 1–1.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 2013-08-26 | Poland F5 | R32 | clay | Piotr Grynkowski | 7-6(6) 2-1 |
Averages over each player's completed matches in the selected window. ATP, WTA & Challenger.