Seong Yoon Chung defeated Seung Bok Baek 6-4 6-1 in the Korea Rep F4 round of 32 on hard. The upset overturned the form book — Seung Bok Baek came in leading the head-to-head 2–0. Seong Yoon Chung claimed a first win over Seung Bok Baek in three meetings, narrowing the head-to-head to 2–1.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 1999-05-24 | Korea F2 | R32 | clay | Seung Bok Baek | 6-1 2-6 6-3 |
| 1995-05-13 | Korea Masters 2 | R32 | hard | Seung Bok Baek | 6-1 6-4 |