Dusan Obradovic defeated Dusan Rajic 6-4 6-3 in the M15 Doboj 1 q64 on clay. The upset overturned the form book — Dusan Rajic came in leading the head-to-head 1–0. Dusan Obradovic claimed a first win over Dusan Rajic in two meetings, narrowing the head-to-head to 1–1.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 2021-08-30 | M15 Ulcinj 1 | Q16 | clay | Dusan Rajic | 6-4 3-6 10-2 |
Averages over each player's completed matches in the selected window. ATP, WTA & Challenger.