Rene Hanak defeated Frantisek Cermak 4-6 6-3 6-1 in the Croatia 4 Masters 3 round of 16 on clay. The upset overturned the form book — Frantisek Cermak came in leading the head-to-head 1–0. Rene Hanak claimed a first win over Frantisek Cermak in two meetings, narrowing the head-to-head to 1–1.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 1997-07-12 | Hungary Masters 4 | R32 | clay | Frantisek Cermak | 6-2 7-5 |
Averages over each player's completed matches in the selected window. ATP, WTA & Challenger.