Maki Arai defeated Moe Kawatoko 6-3 6-4 in the Niigata 10K round of 32 on carpet. The upset overturned the form book — Moe Kawatoko came in leading the head-to-head 1–0. Maki Arai claimed a first win over Moe Kawatoko in two meetings, narrowing the head-to-head to 1–1.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 2009-07-06 | Tokyo 10K | R16 | carpet | Moe Kawatoko | 7-6(4) 6-1 |