Olga Helmi defeated Ayumi Koshiishi 6-3 6-2 in the W15 Monastir 18 final on hard. The upset overturned the form book — Ayumi Koshiishi came in ranked #758, leading the head-to-head 2–0. Olga Helmi claimed a first win over Ayumi Koshiishi in three meetings, narrowing the head-to-head to 2–1.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 2021-07-29 | W15 Monastir 28 | R16 | hard | Ayumi Koshiishi | 6-1 7-5 |
| 2021-04-27 | W15 Monastir 15 | Q16 | hard | Ayumi Koshiishi | 4-6 7-6(6) 10-6 |
Averages over each player's completed matches in the selected window (21 vs 44). 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