Ai Sugiyama defeated Shinobu Asagoe 6-2 6-3 in the Zurich round of 32 on hard. The result followed the form book — Ai Sugiyama came in leading the head-to-head 4–1, defending last year's round of 16. Ai Sugiyama extended the head-to-head to 5–1.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 2004-07-26 | San Diego | R32 | hard | Ai Sugiyama | 6-2 6-2 |
| 2002-09-16 | Tokyo | R32 | hard | Ai Sugiyama | 6-4 6-1 |
| 2002-02-17 | Memphis | R16 | hard | Ai Sugiyama | 6-2 7-6(3) |
| 2001-01-07 | Canberra | R32 | hard | Ai Sugiyama | 6-4 6-2 |
| 2000-09-30 | Tokyo | R16 | hard | Shinobu Asagoe | 6-3 7-5 |
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 (160 vs 31). ATP, WTA & Challenger.