Altug Celikbilek defeated Ryan Peniston 0-6 6-1 6-3 in the Portugal F17 qualifying round on hard. The upset overturned the form book — Ryan Peniston came in leading the head-to-head 2–0, but Altug Celikbilek had been the form player, winning 8 of their last 10 on hard. Altug Celikbilek claimed a first win over Ryan Peniston in three meetings, narrowing the head-to-head to 2–1.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 2023-05-29 | Roland Garros | Q1 | clay | Ryan Peniston | 6-4 6-2 |
| 2023-05-22 | Roland Garros | Q128 | clay | Ryan Peniston | 6-4 6-2 |
Averages over each player's completed matches in the selected window (200 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