Natsumi Kawaguchi defeated Ya Hsuan Lee 6-3 6-2 in the W15 Osaka 1 quarter-final on hard. The result followed the form book — Natsumi Kawaguchi came in ranked #380, leading the head-to-head 3–0. Natsumi Kawaguchi extended the head-to-head to 4–0.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 2025-09-24 | W100 Incheon 1 | R32 | hard | Natsumi Kawaguchi | 6-1 7-5 |
| 2024-05-08 | W75 Fukuoka 1 | R32 | carpet | Natsumi Kawaguchi | 6-1 7-6(4) |
| 2022-11-08 | W25 Yokohama | R32 | hard | Natsumi Kawaguchi | 6-3 6-2 |
Averages over each player's completed matches in the selected window (60 vs 33). 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