Kazusa Ito defeated Yuuki Tanaka 6-2 6-4 in the Noto 25K q16 on grass. The upset overturned the form book — Yuuki Tanaka came in leading the head-to-head 2–0. Kazusa Ito claimed a first win over Yuuki Tanaka in three meetings, narrowing the head-to-head to 2–1.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 2013-09-02 | Noto 25K | R32 | grass | Yuuki Tanaka | 6-4 6-3 |
| 2010-07-05 | Tokyo 10K | QF | carpet | Yuuki Tanaka | 6-2 6-2 |
Averages over each player's completed matches in the selected window. ATP, WTA & Challenger.