Yong Kyu Lim defeated Seong Yoon Chung 6-2 6-2 in the Korea F1 round of 32 on hard. The upset overturned the form book — Seong Yoon Chung came in leading the head-to-head 1–0. Yong Kyu Lim claimed a first win over Seong Yoon Chung in two meetings, narrowing the head-to-head to 1–1.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 2007-05-07 | Korea Rep F3 | R32 | hard | Seong Yoon Chung | 6-4 2-6 6-1 |
Averages over each player's completed matches in the selected window. ATP, WTA & Challenger.