Sung Kyun Kang defeated Takahiro Terachi 6-1 6-4 in the Korea Rep F4 round of 16 on hard. The upset overturned the form book — Takahiro Terachi came in leading the head-to-head 1–0. Sung Kyun Kang claimed a first win over Takahiro Terachi in two meetings, narrowing the head-to-head to 1–1.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 2003-05-12 | Korea Rep F3 | QF | hard | Takahiro Terachi | 6-2 6-3 |