Ya Hsuan Lee defeated Akiko Yonemura 6-2 6-1 in the Tsukuba 25K qualifying round of 16 on hard. The upset overturned the form book — Akiko Yonemura came in leading the head-to-head 2–0. Ya Hsuan Lee claimed a first win over Akiko Yonemura in three meetings, narrowing the head-to-head to 2–1.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 2012-06-11 | Tokyo 10K | R16 | hard | Akiko Yonemura | 6-2 6-3 |
| 2012-03-19 | Kofu 10K | R16 | hard | Akiko Yonemura | 7-5 6-3 |
Averages over each player's completed matches in the selected window. ATP, WTA & Challenger.