Tomoko Yonemura defeated Kimiko Date Krumm 6-1 6-3 in the Tsukuba 25K qualifying round on hard. The upset overturned the form book — Kimiko Date Krumm 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 |
|---|---|---|---|---|---|
| 2009-11-23 | Toyota 75K | SF | carpet | Kimiko Date Krumm | 7-5 6-1 |
| 2008-07-14 | Miyazaki 25K | SF | carpet | Kimiko Date Krumm | 7-6(8) 2-6 6-2 |
| 2008-05-12 | Kurume 50K | QF | grass | Tomoko Yonemura | 6-2 6-2 |
Averages over each player's completed matches in the selected window (2 vs 157). 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