Seiko Okamoto defeated Lei Huang 6-0 6-4 in the Ho Chi Minh City 25K round of 16 on hard. The upset overturned the form book — Lei Huang came in leading the head-to-head 1–0. Seiko Okamoto claimed a first win over Lei Huang in two meetings, narrowing the head-to-head to 1–1.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 2003-11-03 | Taizhou 25K | R32 | hard | Lei Huang | 6-2 5-7 6-4 |