Tomoko Dokei defeated Ayumi Oka 6-3 7-5 in the Ibaraki 25K round of 32 on hard. The upset overturned the form book — Ayumi Oka came in leading the head-to-head 1–0. Tomoko Dokei claimed a first win over Ayumi Oka in two meetings, narrowing the head-to-head to 1–1.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 2009-09-14 | Kyoto 10K | R32 | carpet | Ayumi Oka | 6-4 6-4 |