Shiho Hisamatsu defeated Elena Baltacha 2-6 7-6 6-4 in the Louisville 50K round of 32 on hard. The upset overturned the form book — Elena Baltacha came in leading the head-to-head 2–0. Shiho Hisamatsu claimed a first win over Elena Baltacha in three meetings, narrowing the head-to-head to 2–1.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 2009-05-11 | Kurume 50K | R32 | grass | Elena Baltacha | 6-3 7-6(5) |
| 2007-10-15 | Makinohara 25K | QF | carpet | Elena Baltacha | 2-6 6-3 6-4 |
Averages over each player's completed matches in the selected window (3 vs 105). 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