Kaori Onishi defeated Hirono Watanabe 6-2 3-6 7-5 in the Gardone Val Trompia 10K round of 32 on clay. The upset overturned the form book — Hirono Watanabe came in leading the head-to-head 1–0. Kaori Onishi claimed a first win over Hirono Watanabe in two meetings, narrowing the head-to-head to 1–1.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 2010-11-15 | Hyogo 10K | R32 | carpet | Hirono Watanabe | 6-1 6-4 |