So Jung Kim defeated Chiaki Okadaue 6-3 6-1 in the Incheon 25K round of 32 on hard. The result followed the form book — So Jung Kim came in leading the head-to-head 2–0. So Jung Kim extended the head-to-head to 3–0.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 2011-01-10 | Pingguo 25K | R32 | hard | So Jung Kim | 6-4 7-6(1) |
| 2009-04-27 | Gimcheon 25K | R16 | hard | So Jung Kim | 6-1 6-3 |
Averages over each player's completed matches in the selected window. ATP, WTA & Challenger.