S. Popovic defeated T. Kovac 6-1 3-6 17-15 in the M15 Osijek 1 q64 on clay. The result followed the form book — S. Popovic came in ranked #1567, leading the head-to-head 1–0. S. Popovic extended the head-to-head to 2–0.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 2021-07-04 | M25 Velenje 1 | Q64 | clay | S. Popovic | 6-2 6-1 |