Nudnida Luangnam defeated Shiho Hisamatsu 6-0 6-3 in the Noto 25K qualifying round on carpet. The upset overturned the form book — Shiho Hisamatsu came in leading the head-to-head 2–1. Nudnida Luangnam narrowed the head-to-head to 2–2.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 2009-06-29 | Xiamen 25K | R32 | hard | Nudnida Luangnam | 7-6(5) |
| 2007-09-17 | Tsukuba 25K | R16 | hard | Shiho Hisamatsu | 1-6 6-3 6-2 |
| 2006-09-25 | Tokyo 50K | R16 | hard | Shiho Hisamatsu | 6-1 6-3 |
Averages over each player's completed matches in the selected window. ATP, WTA & Challenger.