Kaori Aoyama defeated Tomoko Yonemura 6-3 6-2 in the Montreal 10K round of 32 on hard. The upset overturned the form book — Tomoko Yonemura came in leading the head-to-head 1–0. Kaori Aoyama claimed a first win over Tomoko Yonemura in two meetings, narrowing the head-to-head to 1–1.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 2004-05-31 | Changwon 25K | R16 | hard | Tomoko Yonemura | 6-0 3-0 |
Averages over each player's completed matches in the selected window. ATP, WTA & Challenger.