Flavia Pennetta defeated Ai Sugiyama 7-6 6-3 in the Los Angeles round of 16 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 32, but Flavia Pennetta had been the form player, winning 4 of their last 9 on hard. Flavia Pennetta claimed a first win over Ai Sugiyama in three meetings, narrowing the head-to-head to 2–1.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 2008-06-23 | Wimbledon | R64 | grass | Ai Sugiyama | 7-6(5) 2-6 6-2 |
| 2004-10-18 | Zurich | R16 | hard | Ai Sugiyama | 7-6(1) 6-1 |
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 (200 vs 67). ATP, WTA & Challenger.
Performance in the biggest moments — break points, deciding sets and tiebreaks (0–100, higher is better). About