Yong Il Yoon defeated Jong Sam Chung 6-0 4-6 6-2 in the Korea Rep F1 round of 16 on clay. The result followed the form book — Yong Il Yoon came in leading the head-to-head 5–0. Yong Il Yoon extended the head-to-head to 6–0.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 2000-02-19 | Indonesia F1 | QF | hard | Yong Il Yoon | 6-3 7-6(7) |
| 1997-05-24 | Korea Masters 2 | SF | clay | Yong Il Yoon | 6-2 6-4 |
| 1997-02-15 | Philippines Masters 2 | SF | hard | Yong Il Yoon | 6-0 6-3 |
| 1996-05-11 | Korea Masters 1 | QF | clay | Yong Il Yoon | 6-3 6-4 |
| 1993-02-05 | Philippines Masters 4 | QF | hard | Yong Il Yoon | 6-1 6-2 |