Sachie Ishizu defeated Katie Obrien 6-0 6-2 in the Gifu 50K qualifying round on hard. The upset overturned the form book — Katie Obrien came in leading the head-to-head 1–0. Sachie Ishizu claimed a first win over Katie Obrien in two meetings, narrowing the head-to-head to 1–1.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 2010-07-12 | Woking 25K | R32 | hard | Katie Obrien | 2-6 6-4 7-6(3) |
Averages over each player's completed matches in the selected window (11 vs 1). 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. Small sample — read as indicative. About