Nicole Vaidisova defeated Ai Sugiyama 6-3 6-4 in the Australian Open 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 64, but Nicole Vaidisova had been the form player, winning 2 of their last 7 on hard. Nicole Vaidisova claimed a first win over Ai Sugiyama in three meetings, narrowing the head-to-head to 2–1.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 2008-07-28 | Montreal | R64 | hard | Ai Sugiyama | 6-3 3-6 6-2 |
| 2006-09-18 | Beijing | R16 | hard | Ai Sugiyama | 6-4 1-6 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 (51 vs 67). ATP, WTA & Challenger.
Performance in the biggest moments — break points, deciding sets and tiebreaks (0–100, higher is better). About