George Cosac defeated Vladimir Voltchkov 4-6 6-3 6-3 in the Turkey 2 Masters 4 semi-final on hard. The upset overturned the form book — Vladimir Voltchkov came in leading the head-to-head 1–0. George Cosac claimed a first win over Vladimir Voltchkov in two meetings, narrowing the head-to-head to 1–1.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 1997-08-16 | Turkey 2 Masters 1 | F | hard | Vladimir Voltchkov | 6-4 6-3 |
Averages over each player's completed matches in the selected window. ATP, WTA & Challenger.