Young Ja Choi defeated Kyung Joo Won 6-0 6-2 in the Seoul I 25K round of 16 on clay. The result followed the form book — Young Ja Choi came in leading the head-to-head 3–1. Young Ja Choi extended the head-to-head to 4–1.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 1999-03-29 | Inchon 10K | R32 | clay | Young Ja Choi | 6-2 6-3 |
| 1997-08-04 | Jakarta 50K | R32 | clay | Kyung Joo Won | 7-6 7-6 |
| 1997-03-17 | Noda 25K | R32 | hard | Young Ja Choi | 6-4 6-0 |
| 1996-05-06 | Seoul II 25K | R32 | clay | Young Ja Choi | 6-4 6-2 |