Tomoko Sugano defeated Maya Kato 6-1 6-1 in the Tokyo 10K round of 32 on hard. The upset overturned the form book — Maya Kato came in leading the head-to-head 3–0. Tomoko Sugano claimed a first win over Maya Kato in four meetings, narrowing the head-to-head to 3–1.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 2009-08-24 | Saitama 10K | R16 | hard | Maya Kato | 6-3 7-5 |
| 2007-07-02 | Nagoya 25K | R32 | hard | Maya Kato | 7-5 6-0 |
| 2005-10-24 | Tokyo 2 10K | R16 | hard | Maya Kato | 1-6 |