Ayumi Oka defeated Kasumi Aiko 6-1 6-0 in the Sutama 10K round of 16 on clay. 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 |
|---|---|---|---|---|---|
| 2007-08-13 | Tokyo 10K | R32 | carpet | Ayumi Oka | 1-6 6-2 7-6(6) |