Zeljko Tosic defeated Nikola Gnjatovic 6-4 6-3 in the Yugoslavia F1 round of 32 on clay. The upset overturned the form book — Nikola Gnjatovic came in leading the head-to-head 1–0. Zeljko Tosic claimed a first win over Nikola Gnjatovic in two meetings, narrowing the head-to-head to 1–1.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 1997-08-09 | Yugoslavia 2 Masters 3 | R32 | clay | Nikola Gnjatovic | 6-2 6-7 6-3 |