Karen Tsutsumi defeated Himari Sato 6-2 6-4 in the W15 Osaka 1 q32 on hard. The upset overturned the form book — Himari Sato came in leading the head-to-head 1–0. Karen Tsutsumi claimed a first win over Himari Sato in two meetings, narrowing the head-to-head to 1–1.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 2025-03-30 | W15 Kashiwa 1 | Q16 | hard | Himari Sato | 7-6(2) 6-3 |
Averages over each player's completed matches in the selected window (3 vs 43). ATP, WTA & Challenger.
Each player's serve crossed against the other's return, converted to expected hold of serve. Recent completed matches, ATP, WTA & Challenger. About