Aiko Nakamura defeated Mayumi Yamamoto 6-2 3-6 6-3 in the Haibara 25K round of 32 on carpet. The result followed the form book — Aiko Nakamura came in leading the head-to-head 2–0. Aiko Nakamura extended the head-to-head to 3–0.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 2005-05-09 | Fukuoka 50K | R32 | grass | Aiko Nakamura | 6-1 7-6(6) |
| 2003-05-19 | Gunma 10K | R16 | grass | Aiko Nakamura | 6-2 2-6 6-4 |
Averages over each player's completed matches in the selected window. ATP, WTA & Challenger.