Chinami Ogi defeated Mari Inoue 6-2 6-1 in the Tsukuba 25K qualifying round of 32 on hard. The upset overturned the form book — Mari Inoue came in leading the head-to-head 1–0. Chinami Ogi claimed a first win over Mari Inoue in two meetings, narrowing the head-to-head to 1–1.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 2009-06-08 | Tokyo 10K | R32 | hard | Mari Inoue | 6-4 6-4 |