Yong Il Yoon defeated Takeshi Itoh 6-4 6-3 in the Japan F2 round of 16 on carpet. The upset overturned the form book — Takeshi Itoh came in leading the head-to-head 1–0. Yong Il Yoon claimed a first win over Takeshi Itoh in two meetings, narrowing the head-to-head to 1–1.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 2004-03-15 | New Zealand F3 | R32 | hard | Takeshi Itoh | 6-0 3-6 7-6(3) |