Keiko Taguchi defeated Seiko Okamoto 6-4 6-2 in the Easton 10K round of 32 on hard. The upset overturned the form book — Seiko Okamoto came in leading the head-to-head 2–0. Keiko Taguchi claimed a first win over Seiko Okamoto in three meetings, narrowing the head-to-head to 2–1.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 2002-10-14 | Haibara 25K | R16 | carpet | Seiko Okamoto | 6-0 6-3 |
| 2000-11-20 | Kofu Open | F | carpet | Seiko Okamoto | 4-1 1-4 4-1 5-3 |