Vasko Mladenov defeated Aleksandar Cvetkov 7-5 6-1 in the Bulgaria F6 qualifying round on clay. The upset overturned the form book — Aleksandar Cvetkov came in leading the head-to-head 1–0, but Vasko Mladenov had been the form player, winning 4 of their last 9 on clay. Vasko Mladenov claimed a first win over Aleksandar Cvetkov in two meetings, narrowing the head-to-head to 1–1.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 2008-08-18 | Bulgaria F5 | SF | clay | Aleksandar Cvetkov | 6-1 7-5 |
Averages over each player's completed matches in the selected window. ATP, WTA & Challenger.