Aiko Nakamura defeated Chin Wei Chan 6-3 2-6 6-3 in the Tsukuba 25K final on hard. The upset overturned the form book — Chin Wei Chan came in leading the head-to-head 2–0. Aiko Nakamura claimed a first win over Chin Wei Chan in three meetings, narrowing the head-to-head to 2–1.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 2012-06-25 | Incheon 25K | QF | hard | Chin Wei Chan | 6-4 6-4 |
| 2003-06-02 | Seoul 25K | R16 | hard | Chin Wei Chan | 7-6(3) 3-6 7-6(1) |
Averages over each player's completed matches in the selected window. ATP, WTA & Challenger.