I. Biletic defeated J. Kupcic 7-6 6-3 in the M25 Maribor 1 round of 32 on clay. The upset overturned the form book — J. Kupcic came in ranked #1150, leading the head-to-head 1–0. I. Biletic claimed a first win over J. Kupcic in two meetings, narrowing the head-to-head to 1–1.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 2025-03-10 | M15 Porec 1 | Q32 | clay | J. Kupcic | 6-3 5-7 10-5 |