Grega Zemlja defeated Frantisek Polyak 6-4 6-3 in the Slovenia F2 round of 16 on clay. The upset overturned the form book — Frantisek Polyak came in leading the head-to-head 1–0. Grega Zemlja claimed a first win over Frantisek Polyak in two meetings, narrowing the head-to-head to 1–1.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 2004-08-23 | Croatia F5 | R32 | clay | Frantisek Polyak | 7-6(3) 7-6(9) |
Averages over each player's completed matches in the selected window. ATP, WTA & Challenger.