Tomoko Sugano defeated Akiko Yonemura 5-7 7-6 6-4 in the Yamaguchi 10K round of 16 on clay. The upset overturned the form book — Akiko Yonemura came in leading the head-to-head 1–0. Tomoko Sugano claimed a first win over Akiko Yonemura in two meetings, narrowing the head-to-head to 1–1.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 2007-07-30 | Obihiro 25K | R16 | carpet | Akiko Yonemura | 6-0 6-2 |
Averages over each player's completed matches in the selected window. ATP, WTA & Challenger.