Miharu Imanishi defeated Yuriko Sakai 6-4 6-1 in the Taipei 10K round of 16 on hard. The upset overturned the form book — Yuriko Sakai came in leading the head-to-head 1–0. Miharu Imanishi claimed a first win over Yuriko Sakai in two meetings, narrowing the head-to-head to 1–1.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 2011-10-03 | Kofu 50K | QF | hard | Yuriko Sakai | 6-2 4-6 6-3 |
Averages over each player's completed matches in the selected window. ATP, WTA & Challenger.