Ayumi Oka defeated Ayaka Maekawa 1-6 7-5 6-4 in the Sutama 10K qualifying round on clay. Ayumi Oka extended the head-to-head to 2–1.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 2009-08-17 | Pingguo 25K | R32 | hard | Ayaka Maekawa | 6-3 6-3 |
| 2007-09-03 | Kyoto 10K | R16 | carpet | Ayumi Oka | 6-4 6-7(3) 6-1 |