Seiko Okamoto defeated Erika Sema 6-3 6-1 in the Noto 25K round of 32 on carpet. The result followed the form book — Seiko Okamoto came in leading the head-to-head 2–0. Seiko Okamoto extended the head-to-head to 3–0.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 2006-10-30 | Sutama 25K | R32 | clay | Seiko Okamoto | 6-2 6-4 |
| 2006-07-10 | Miyazaki 25K | R32 | carpet | Seiko Okamoto | 6-1 7-6(3) |
Averages over each player's completed matches in the selected window. ATP, WTA & Challenger.