Ji Sun Kim defeated Ji Young Kim 6-1 6-4 in the Gimcheon 10K round of 16 on hard. The upset overturned the form book — Ji Young Kim came in leading the head-to-head 1–0, but Ji Sun Kim had been the form player, winning 4 of their last 10 on hard. Ji Sun Kim claimed a first win over Ji Young Kim in two meetings, narrowing the head-to-head to 1–1.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 2009-07-06 | Sunchang 10K | R16 | hard | Ji Young Kim | 6-4 6-3 |