Tomoko Yonemura defeated Aiko Nakamura 6-3 6-0 in the Osaka 10K round of 16 on hard. The upset overturned the form book — Aiko Nakamura came in leading the head-to-head 2–1. Tomoko Yonemura narrowed the head-to-head to 2–2.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 2009-04-27 | Gifu 50K | F | carpet | Aiko Nakamura | 6-1 6-4 |
| 2008-05-05 | Fukuoka 50K | SF | grass | Tomoko Yonemura | 6-2 3-6 7-6(0) |
| 2005-09-12 | Bali | R32 | hard | Aiko Nakamura | 7-6 7-5 |
Averages over each player's completed matches in the selected window (2 vs 66). 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. Small sample — read as indicative. About