Ayumi Oka defeated Kasumi Aiko 1-6 6-2 7-6 in the Tokyo 10K round of 32 on carpet. The result followed the form book — Ayumi Oka came in leading the head-to-head 1–0. Ayumi Oka extended the head-to-head to 2–0.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 2008-06-16 | Sutama 10K | R16 | clay | Ayumi Oka | 6-1 6-0 |