Aki Yamasoto defeated Qiang Wang 6-2 6-1 in the Makinohara 25K qualifying round on carpet. The upset overturned the form book — Qiang Wang came in leading the head-to-head 3–0. Aki Yamasoto claimed a first win over Qiang Wang in four meetings, narrowing the head-to-head to 3–1.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 2011-05-23 | Niigata 25K | R16 | hard | Qiang Wang | 6-3 6-2 |
| 2010-09-13 | Kyoto 10K | R32 | carpet | Qiang Wang | 7-5 6-7(4) 6-2 |
| 2009-06-08 | Tokyo 10K | R32 | hard | Qiang Wang | 7-5 7-6(4) |
Averages over each player's completed matches in the selected window. ATP, WTA & Challenger.