Berfu Cengiz defeated Zeynep Sonmez 4-6 6-1 6-4 in the W60 Istanbul quarter-final on clay. The upset overturned the form book — Zeynep Sonmez came in ranked #48. Berfu Cengiz extended the head-to-head to 3–0.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 2020-12-19 | W15 Antalya 12 | SF | clay | Berfu Cengiz | 7-6(9) 6-3 |
| 2019-04-09 | W60 Istanbul | R32 | hard | Berfu Cengiz | 7-6(2) 6-3 |
Averages over each player's completed matches in the selected window (46 vs 150). 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