Mami Hasegawa defeated Yuriko Sakai 6-7 6-4 6-1 in the Hamamatsu $25K qualifying round of 64 on grass. The result followed the form book — Mami Hasegawa came in leading the head-to-head 1–0. Mami Hasegawa extended the head-to-head to 2–0.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 2015-03-23 | Nishi Tama $10K | Q32 | hard | Mami Hasegawa | 6-4 6-1 |
Averages over each player's completed matches in the selected window. ATP, WTA & Challenger.