Seiko Okamoto defeated Tomoyo Takagishi 6-2 3-6 7-6 in the Ho Chi Minh City 25K semi-final on hard. The result followed the form book — Seiko Okamoto came in leading the head-to-head 2–0. Seiko Okamoto extended the head-to-head to 3–0.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 2009-05-18 | Nagano 25K | R32 | carpet | Seiko Okamoto | 5-7 6-1 6-3 |
| 2008-05-26 | Gunma 25K | R32 | carpet | Seiko Okamoto | 6-4 6-7(3) 7-5 |