Honoka Kobayashi defeated Ai Yamaguchi 6-4 6-2 in the W15 Nakhon Si Thammarat 4 round of 16 on hard. The result followed the form book — Honoka Kobayashi came in leading the head-to-head 1–0. Honoka Kobayashi extended the head-to-head to 2–0.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 2020-03-03 | W25 Yokohama | Q32 | hard | Honoka Kobayashi | 6-0 6-0 |
Averages over each player's completed matches in the selected window. ATP, WTA & Challenger.