Yuuki Tanaka defeated Chiaki Okadaue 6-3 5-7 7-5 in the Kofu 10K semi-final on hard. The upset overturned the form book — Chiaki Okadaue came in leading the head-to-head 3–0. Yuuki Tanaka claimed a first win over Chiaki Okadaue in four meetings, narrowing the head-to-head to 3–1.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 2014-05-19 | Karuizawa 25K | R32 | grass | Chiaki Okadaue | 3-6 6-3 6-3 |
| 2013-03-25 | Nishi Tama 10K | R16 | hard | Chiaki Okadaue | 6-1 6-4 |
| 2012-06-11 | Tokyo 10K | R32 | hard | Chiaki Okadaue | 6-2 6-1 |
Averages over each player's completed matches in the selected window (49 vs 2). 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