Chiaki Okadaue defeated Mana Ayukawa 3-6 7-6 6-2 in the Kofu 10K final on hard. The upset overturned the form book — Mana Ayukawa came in leading the head-to-head 1–0, but Chiaki Okadaue had been the form player, winning 3 of their last 6 on hard. Chiaki Okadaue claimed a first win over Mana Ayukawa in two meetings, narrowing the head-to-head to 1–1.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 2013-05-06 | Fukuoka 50K | Q32 | grass | Mana Ayukawa | 6-2 6-3 |
Averages over each player's completed matches in the selected window (2 vs 144). 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