Mari Tanaka defeated Haruka Inoue 6-2 6-7 6-3 in the Ibaraki 25K round of 16 on hard. The upset overturned the form book — Haruka Inoue came in leading the head-to-head 1–0. Mari Tanaka claimed a first win over Haruka Inoue in two meetings, narrowing the head-to-head to 1–1.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 2005-09-05 | Kyoto 10K | R16 | carpet | Haruka Inoue | 7-5 7-5 |
Averages over each player's completed matches in the selected window. ATP, WTA & Challenger.