Seong Yoon Chung defeated Hee Seok Chung 7-6 3-6 6-4 in the Korea Rep F2 round of 16 on hard. The upset overturned the form book — Hee Seok Chung came in leading the head-to-head 2–0. Seong Yoon Chung claimed a first win over Hee Seok Chung in three meetings, narrowing the head-to-head to 2–1.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 2004-08-16 | Indonesia F3 | R16 | hard | Hee Seok Chung | 6-1 5-7 6-3 |
| 2004-08-09 | Indonesia F2 | R16 | hard | Hee Seok Chung | 3-6 6-2 6-4 |