Ivan Cinkus defeated Vjekoslav Skenderovic 6-4 6-4 in the Croatia 1 4 qualifying round on clay. The upset overturned the form book — Vjekoslav Skenderovic came in leading the head-to-head 1–0. Ivan Cinkus claimed a first win over Vjekoslav Skenderovic in two meetings, narrowing the head-to-head to 1–1.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 2003-08-25 | Croatia F5 | QF | clay | Vjekoslav Skenderovic | 7-5 6-3 |