Seiko Okamoto defeated Amber Liu 6-1 6-2 in the Gunma 10K round of 32 on carpet. The result followed the form book — Seiko Okamoto came in leading the head-to-head 1–0. Seiko Okamoto extended the head-to-head to 2–0.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 2004-06-28 | Los Gatos 50K | R32 | hard | Seiko Okamoto | 6-4 6-2 |
Averages over each player's completed matches in the selected window. ATP, WTA & Challenger.