Maki Arai defeated Miki Miyamura 6-4 6-2 in the Tokyo 10K round of 16 on hard. The upset overturned the form book — Miki Miyamura came in leading the head-to-head 2–0. Maki Arai claimed a first win over Miki Miyamura in three meetings, narrowing the head-to-head to 2–1.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 2008-06-16 | Sutama 10K | F | clay | Miki Miyamura | 6-3 6-3 |
| 2005-10-24 | Tokyo 2 10K | R32 | hard | Miki Miyamura | 7-6(3) 6-4 |
Averages over each player's completed matches in the selected window. ATP, WTA & Challenger.