Shiho Hisamatsu defeated Aiko Nakamura 4-6 6-0 6-0 in the Kugayama 10K round of 32 on hard. The upset overturned the form book — Aiko Nakamura came in leading the head-to-head 2–0. Shiho Hisamatsu claimed a first win over Aiko Nakamura in three meetings, narrowing the head-to-head to 2–1.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 2008-04-28 | Gifu 50K | R32 | carpet | Aiko Nakamura | 6-1 6-0 |
| 2003-10-27 | Beijing 25K | QF | hard | Aiko Nakamura | 6-1 6-3 |
Averages over each player's completed matches in the selected window. ATP, WTA & Challenger.