Sara Saito defeated Haruka Kaji 7-5 7-6 in the W60 Fukuoka round of 32 on carpet. The upset overturned the form book — Haruka Kaji came in leading the head-to-head 2–1. Sara Saito narrowed the head-to-head to 2–2.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 2025-03-22 | W50 Kofu 1 | SF | hard | Haruka Kaji | 5-7 6-2 6-3 |
| 2024-01-11 | W50 Nonthaburi 2 | R16 | hard | Sara Saito | 7-5 3-6 5-0 |
| 2023-04-11 | W25 Osaka | R32 | hard | Haruka Kaji | 6-0 6-3 |
Averages over each player's completed matches in the selected window (97 vs 95). 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