Chiaki Okadaue defeated Junri Namigata 6-0 6-4 in the Gunma 25K qualifying round on carpet. The upset overturned the form book — Junri Namigata came in leading the head-to-head 4–1. Chiaki Okadaue narrowed the head-to-head to 4–2.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 2010-11-22 | Toyota 75K | R16 | carpet | Junri Namigata | 5-7 6-1 6-3 |
| 2009-07-27 | Obihiro-Tokachi 25K | QF | carpet | Junri Namigata | 6-0 6-4 |
| 2007-09-10 | Tokyo 50K | R32 | hard | Junri Namigata | 6-1 6-2 |
| 2007-07-02 | Nagoya 25K | R32 | hard | Junri Namigata | 6-2 6-3 |
| 2006-07-03 | Nagoya 25K | QF | hard | Chiaki Okadaue | 4-6 6-3 4-0 |
Averages over each player's completed matches in the selected window (2 vs 200). 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