Seong Yoon Chung defeated Byung Kook Kang 6-3 7-6 in the Korea Rep F3 round of 32 on hard. The upset overturned the form book — Byung Kook Kang came in leading the head-to-head 2–0. Seong Yoon Chung claimed a first win over Byung Kook Kang in three meetings, narrowing the head-to-head to 2–1.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 2008-07-28 | Indonesia F1 | R16 | hard | Byung Kook Kang | 6-1 6-2 |
| 2007-08-06 | Indonesia F2 | R32 | hard | Byung Kook Kang | 6-2 6-4 |