Mert Naci Turker defeated Valentin Kopeikin 7-5 7-6 in the M15 Kayseri 3 round of 32 on hard. The upset overturned the form book — Valentin Kopeikin came in leading the head-to-head 1–0, but Mert Naci Turker had been the form player, winning 3 of their last 6 on hard. Mert Naci Turker claimed a first win over Valentin Kopeikin in two meetings, narrowing the head-to-head to 1–1.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 2021-11-22 | M15 Antalya 33 | Q32 | clay | Valentin Kopeikin | 1-6 6-4 10-6 |
Averages over each player's completed matches in the selected window (78 vs 40). ATP, WTA & Challenger.
Naci Turker M.: 20 days rest. Higher means fresher. About
wins 54% of points on serve vs Naci Turker M.
Each player's serve crossed against the other's return, converted to expected hold of serve. Recent completed matches, ATP, WTA & Challenger. About