Katie Ruckert defeated Akiko Yonemura 6-2 3-6 6-2 in the Waterloo 25K round of 16 on clay. The upset overturned the form book — Akiko Yonemura came in leading the head-to-head 1–0. Katie Ruckert claimed a first win over Akiko Yonemura in two meetings, narrowing the head-to-head to 1–1.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 2009-08-31 | Tsukuba 25K | R32 | hard | Akiko Yonemura | 6-2 7-5 |
Averages over each player's completed matches in the selected window. ATP, WTA & Challenger.