Koray Kirci defeated Altug Celikbilek 6-3 1-6 7-6 in the Turkey F28 round of 16 on hard. The upset overturned the form book — Altug Celikbilek came in leading the head-to-head 2–0. Koray Kirci claimed a first win over Altug Celikbilek in three meetings, narrowing the head-to-head to 2–1.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 2018-02-19 | Turkey F7 | R32 | hard | Altug Celikbilek | 7-6(4) 2-6 6-1 |
| 2017-04-24 | Turkey F16 | R32 | clay | Altug Celikbilek | 5-7 6-3 6-1 |
Averages over each player's completed matches in the selected window (21 vs 200). ATP, WTA & Challenger.
Each player's serve crossed against the other's return, converted to expected hold of serve. Recent completed matches, ATP, WTA & Challenger. About