Hirono Watanabe defeated Yuuki Tanaka 4-6 6-3 7-6 in the Hyogo 10K round of 16 on carpet. The upset overturned the form book — Yuuki Tanaka came in leading the head-to-head 2–0. Hirono Watanabe claimed a first win over Yuuki Tanaka in three meetings, narrowing the head-to-head to 2–1.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 2015-05-04 | Fukuoka $50K | Q32 | grass | Yuuki Tanaka | 6-2 6-1 |
| 2014-06-02 | Tokyo 10K | R32 | hard | Yuuki Tanaka | 3-6 6-4 6-2 |
Averages over each player's completed matches in the selected window. ATP, WTA & Challenger.