Yong Il Yoon defeated Hee Sung Chung 6-3 6-3 in the Korea Rep F3 round of 32 on hard. The result followed the form book — Yong Il Yoon came in leading the head-to-head 3–0. Yong Il Yoon extended the head-to-head to 4–0.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 2000-05-22 | Korea F1 | QF | clay | Yong Il Yoon | 3-6 6-1 6-3 |
| 1996-05-11 | Korea Masters 2 | R16 | clay | Yong Il Yoon | 6-3 6-1 |
| 1996-05-11 | Korea Masters 4 | R32 | clay | Yong Il Yoon | 6-2 6-4 |