Seiko Okamoto defeated Jeong A Cho 6-0 6-1 in the Inchon 10K round of 16 on hard. The upset overturned the form book — Jeong A Cho came in leading the head-to-head 1–0. Seiko Okamoto claimed a first win over Jeong A Cho in two meetings, narrowing the head-to-head to 1–1.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 2004-06-21 | Inchon 25K | R16 | hard | Jeong A Cho | 6-1 7-5 |