Sybille Bammer defeated Ai Sugiyama 6-4 6-2 in the Stanford round of 32 on hard. The upset overturned the form book — Ai Sugiyama came in leading the head-to-head 2–0, defending last year's round of 16, but Sybille Bammer had been the form player, winning 2 of their last 6 on hard. Sybille Bammer claimed a first win over Ai Sugiyama in three meetings, narrowing the head-to-head to 2–1.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 2007-10-22 | Linz | R32 | hard | Ai Sugiyama | 2-6 7-6(5) 6-0 |
| 2007-07-30 | San Diego | R32 | hard | Ai Sugiyama | 6-2 7-6(3) |
Each player's serve crossed against the other's return, converted to expected hold of serve. Recent completed matches, ATP, WTA & Challenger. About
Averages over each player's completed matches in the selected window (174 vs 104). ATP, WTA & Challenger.
Performance in the biggest moments — break points, deciding sets and tiebreaks (0–100, higher is better). About