Sachie Ishizu defeated Akiko Yonemura 6-2 6-2 in the Niigata 25K qualifying round on hard. The result followed the form book — Sachie Ishizu came in leading the head-to-head 3–0. Sachie Ishizu extended the head-to-head to 4–0.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 2010-05-10 | Kurume 50K | R16 | grass | Sachie Ishizu | 6-3 6-4 |
| 2010-03-22 | Kofu 10K | F | hard | Sachie Ishizu | 1-6 6-1 6-0 |
| 2008-09-01 | Tsukuba 25K | R32 | hard | Sachie Ishizu | 7-5 6-0 |
Averages over each player's completed matches in the selected window. ATP, WTA & Challenger.