Shiho Hisamatsu defeated Montinee Tangphong 6-4 6-0 in the Hamanako 25K round of 16 on carpet. The upset overturned the form book — Montinee Tangphong came in leading the head-to-head 1–0. Shiho Hisamatsu claimed a first win over Montinee Tangphong in two meetings, narrowing the head-to-head to 1–1.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 2008-09-01 | Tsukuba 25K | R32 | hard | Montinee Tangphong | 7-6(5) 6-4 |
Averages over each player's completed matches in the selected window. ATP, WTA & Challenger.