Guillermo Hormazabal defeated Grzegorz Panfil 6-1 7-5 in the Poland F4 final on clay. The upset overturned the form book — Grzegorz Panfil came in leading the head-to-head 2–0. Guillermo Hormazabal claimed a first win over Grzegorz Panfil in three meetings, narrowing the head-to-head to 2–1.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 2010-05-31 | Poland F3 | QF | clay | Grzegorz Panfil | 4-4 |
| 2008-05-19 | Poland F2 | F | clay | Grzegorz Panfil | 3-6 6-1 6-4 |
Averages over each player's completed matches in the selected window. ATP, WTA & Challenger.