Christian Groh defeated Dusan Mihailovic 7-6 6-7 7-5 in the Bulgaria 1 2 round of 32 on clay. The upset overturned the form book — Dusan Mihailovic came in leading the head-to-head 1–0. Christian Groh claimed a first win over Dusan Mihailovic in two meetings, narrowing the head-to-head to 1–1.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 2002-08-19 | Poland F6 | R16 | clay | Dusan Mihailovic | 4-6 7-6(3) 6-1 |