S. Kostic defeated Wayne Mcnicol 6-1 6-0 in the M15 Kursumlijska Banja qualifying round of 64 on clay. The result followed the form book — S. Kostic came in leading the head-to-head 1–0. S. Kostic extended the head-to-head to 2–0.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 2025-07-20 | M15 Kursumlijska Banja 12 | Q64 | clay | S. Kostic | 6-3 6-2 |