Yong Il Yoon advanced when Young Jun Kim retired 5-7 6-3 5-0 in the Korea Rep F2 round of 32. Yong Il Yoon extended the head-to-head to 3–1.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 2003-05-12 | Korea Rep F3 | R16 | hard | Yong Il Yoon | 2-6 6-4 6-4 |
| 2003-05-05 | Korea Rep F2 | QF | clay | Young Jun Kim | 6-4 6-3 |
| 1998-05-25 | Korea F1 | R16 | hard | Yong Il Yoon | 6-2 6-1 |