Hae Sung Kim defeated Ji Sun Kim 4-6 7-5 6-2 in the Goyang 25K round of 32 on hard. Hae Sung Kim extended the head-to-head to 2–1.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 2012-10-22 | Seoul 25K | Q16 | hard | Hae Sung Kim | 7-6(4) 6-1 |
| 2009-06-29 | Gimcheon 10K | R16 | hard | Ji Sun Kim | 6-4 6-2 |