Mert Naci Turker defeated Sandro Kopp 2-6 6-4 6-0 in the Turkey F17 round of 32 on clay. The upset overturned the form book — Sandro Kopp came in ranked #280, leading the head-to-head 1–0. Mert Naci Turker claimed a first win over Sandro Kopp in two meetings, narrowing the head-to-head to 1–1.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 2020-01-21 | M15 Antalya 3 | R32 | clay | Sandro Kopp | 6-4 6-3 |
Averages over each player's completed matches in the selected window (157 vs 199). ATP, WTA & Challenger.
Naci Turker M.: 16 days rest · Kopp S.: 1 day rest · 3 matches, 69 games (7d). Higher means fresher. About
Each player's serve crossed against the other's return, converted to expected hold of serve. Recent completed matches, ATP, WTA & Challenger. About