Kyung Yee Chae defeated Kyung Mi Chang 6-2 6-2 in the Seoul 25K round of 32 on hard. The upset overturned the form book — Kyung Mi Chang came in leading the head-to-head 4–3. Kyung Yee Chae narrowed the head-to-head to 4–4.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 2008-08-25 | Gimhae 10K | SF | hard | Kyung Yee Chae | 1-6 6-4 6-2 |
| 2007-10-29 | Kofu 10K | QF | hard | Kyung Mi Chang | 2-6 6-2 6-2 |
| 2002-07-22 | Inchon 10K | QF | hard | Kyung Mi Chang | 6-3 6-3 |
| 2002-07-15 | Seoul 10K | F | hard | Kyung Mi Chang | 4-6 6-3 6-1 |
| 2000-09-18 | Kyoto 10K | SF | carpet | Kyung Mi Chang | 6-2 1-6 6-3 |
| 2000-06-05 | Inchon 10K | QF | hard | Kyung Yee Chae | 6-3 6-3 |
| 1999-03-29 | Inchon 10K | R32 | clay | Kyung Yee Chae | 7-5 7-6 |