Junri Namigata defeated Ayumi Oka 7-5 6-3 in the Kusatsu 25K round of 16 on carpet. The result followed the form book — Junri Namigata came in leading the head-to-head 3–0. Junri Namigata extended the head-to-head to 4–0.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 2010-05-03 | Fukuoka 50K | R32 | grass | Junri Namigata | 6-2 6-0 |
| 2009-05-25 | Gunma 25K | QF | carpet | Junri Namigata | 6-7(7) 6-2 7-5 |
| 2007-05-07 | Fukuoka 50K | R32 | carpet | Junri Namigata | 6-3 6-1 |
Averages over each player's completed matches in the selected window. ATP, WTA & Challenger.