Shiho Akita defeated Mari Inoue 6-0 3-6 6-1 in the Makinohara 25K round of 16 on carpet. The upset overturned the form book — Mari Inoue came in leading the head-to-head 1–0. Shiho Akita claimed a first win over Mari Inoue in two meetings, narrowing the head-to-head to 1–1.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 2011-05-16 | Karuizawa 25K | R32 | carpet | Mari Inoue | 7-6(5) 6-1 |
Averages over each player's completed matches in the selected window. ATP, WTA & Challenger.