Josip Dumanic defeated Luka Kutanjac 7-6 6-3 in the Croatia 4 Masters 1 round of 16 on clay. The upset overturned the form book — Luka Kutanjac came in leading the head-to-head 1–0. Josip Dumanic claimed a first win over Luka Kutanjac in two meetings, narrowing the head-to-head to 1–1.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 1997-08-09 | Croatia 4 Masters 2 | R32 | clay | Luka Kutanjac | 6-2 1-6 6-1 |