Saori Obata defeated Ai Sugiyama 6-4 6-4 in the Australian Open round of 64 on hard. The upset overturned the form book — Ai Sugiyama came in leading the head-to-head 3–0, defending last year's round of 64. Saori Obata claimed a first win over Ai Sugiyama in four meetings, narrowing the head-to-head to 3–1.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 2003-08-04 | Los Angeles | R32 | hard | Ai Sugiyama | 2-6 6-3 6-3 |
| 2002-09-09 | Shanghai | R32 | hard | Ai Sugiyama | 6-4 6-2 |
| 2002-02-17 | Memphis | R32 | hard | Ai Sugiyama | 7-6(6) 6-4 |
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 (9 vs 159). ATP, WTA & Challenger.