Eliessa Vanlangendonck defeated Ayumi Koshiishi 6-1 4-6 6-2 in the W15 Monastir 26 semi-final on hard. The upset overturned the form book — Ayumi Koshiishi came in leading the head-to-head 2–0. Eliessa Vanlangendonck claimed a first win over Ayumi Koshiishi in three meetings, narrowing the head-to-head to 2–1.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 2021-08-01 | W15 Monastir 28 | F | hard | Ayumi Koshiishi | 6-1 6-0 |
| 2021-07-23 | W15 Monastir 27 | QF | hard | Ayumi Koshiishi | 6-4 6-3 |
Averages over each player's completed matches in the selected window (5 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