Chiaki Okadaue defeated Yuka Mori 6-1 6-0 in the Gifu 50K qualifying round on hard. The result followed the form book — Chiaki Okadaue came in leading the head-to-head 2–0. Chiaki Okadaue extended the head-to-head to 3–0.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 2013-06-17 | Tokyo 10K | R32 | hard | Chiaki Okadaue | 4-6 7-5 7-5 |
| 2013-03-25 | Nishi Tama 10K | R32 | hard | Chiaki Okadaue | 6-4 3-6 6-2 |
Averages over each player's completed matches in the selected window. ATP, WTA & Challenger.