Cosmin Ontica defeated Chris Anguelov 6-1 2-6 6-4 in the Bulgaria F4 qualifying round of 32 on clay. The upset overturned the form book — Chris Anguelov came in leading the head-to-head 1–0. Cosmin Ontica claimed a first win over Chris Anguelov in two meetings, narrowing the head-to-head to 1–1.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 2013-07-08 | Bulgaria F7 | Q32 | clay | Chris Anguelov | 7-6(5) 3-6 7-6(1) |
Averages over each player's completed matches in the selected window. ATP, WTA & Challenger.