Mari Inoue defeated Shiho Akita 7-6 6-1 in the Karuizawa 25K round of 32 on carpet. The upset overturned the form book — Shiho Akita came in leading the head-to-head 1–0. Mari Inoue claimed a first win over Shiho Akita in two meetings, narrowing the head-to-head to 1–1.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 2010-09-20 | Makinohara 25K | R16 | carpet | Shiho Akita | 6-0 3-6 6-1 |
Averages over each player's completed matches in the selected window. ATP, WTA & Challenger.