Sara Saito defeated Natsumi Kawaguchi 6-4 6-1 in the W35 Osaka 1 round of 32 on hard. The result followed the form book — Sara Saito came in ranked #241, leading the head-to-head 2–1. Sara Saito extended the head-to-head to 3–1.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 2025-09-25 | W100 Incheon 1 | R16 | hard | Sara Saito | 6-4 6-4 |
| 2023-05-12 | W60 Fukuoka | QF | carpet | Natsumi Kawaguchi | 1-6 7-6(4) 7-6(4) |
| 2022-09-26 | W25 Nanao | Q16 | carpet | Sara Saito | 3-6 6-3 10-5 |
Averages over each player's completed matches in the selected window (95 vs 57). 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