Natsumi Kawaguchi defeated Ya Hsuan Lee 6-1 7-5 in the W100 Incheon round of 32 on hard. The result followed the form book — Natsumi Kawaguchi came in ranked #393, leading the head-to-head 4–0. Natsumi Kawaguchi extended the head-to-head to 5–0.
| 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) |
| 2023-04-21 | W15 Osaka 1 | QF | hard | Natsumi Kawaguchi | 6-3 6-2 |
| 2022-11-08 | W25 Yokohama | R32 | hard | Natsumi Kawaguchi | 6-3 6-2 |
Averages over each player's completed matches in the selected window (110 vs 53). 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