Etsuko Kitazaki defeated Kazusa Ito 6-1 1-6 6-2 in the Niigata 25K q32 on hard. The upset overturned the form book — Kazusa Ito came in leading the head-to-head 2–0. Etsuko Kitazaki claimed a first win over Kazusa Ito in three meetings, narrowing the head-to-head to 2–1.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 2011-09-12 | Kyoto 10K | R16 | carpet | Kazusa Ito | 6-1 6-0 |
| 2009-06-08 | Tokyo 10K | R32 | hard | Kazusa Ito | 6-1 6-2 |