Chiaki Okadaue defeated Mari Tanaka 6-2 6-4 in the Tokyo 10K semi-final on hard. The upset overturned the form book — Mari Tanaka came in leading the head-to-head 2–0. Chiaki Okadaue claimed a first win over Mari Tanaka in three meetings, narrowing the head-to-head to 2–1.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 2014-10-20 | Hamamatsu 25K | R16 | carpet | Mari Tanaka | 6-3 7-5 |
| 2014-05-26 | Changwon 25K | R16 | hard | Mari Tanaka | 6-3 6-2 |
Averages over each player's completed matches in the selected window (2 vs 3). ATP, WTA & Challenger.
Each player's serve crossed against the other's return, converted to expected hold of serve. Recent completed matches, ATP, WTA & Challenger. About