Wynne Prakusya defeated Shiho Hisamatsu 4-6 6-2 6-3 in the Karuizawa 25K qualifying round on carpet. The upset overturned the form book — Shiho Hisamatsu came in leading the head-to-head 1–0. Wynne Prakusya claimed a first win over Shiho Hisamatsu in two meetings, narrowing the head-to-head to 1–1.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 2000-05-08 | Seoul 50K | R32 | clay | Shiho Hisamatsu | 2-6 7-5 6-4 |
Averages over each player's completed matches in the selected window. ATP, WTA & Challenger.