Kei Sekine defeated Tomoko Sugano 7-5 6-4 in the Sutama 10K round of 16 on clay. The upset overturned the form book — Tomoko Sugano came in leading the head-to-head 1–0. Kei Sekine claimed a first win over Tomoko Sugano in two meetings, narrowing the head-to-head to 1–1.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 2009-09-14 | Kyoto 10K | R32 | carpet | Tomoko Sugano | 6-4 6-1 |