Els Callens defeated Ai Sugiyama 1-6 6-2 6-4 in the Tokyo 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 quarter-final. Els Callens claimed a first win over Ai Sugiyama in three meetings, narrowing the head-to-head to 2–1.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 2004-02-03 | Tokyo | R16 | hard | Ai Sugiyama | 6-3 6-3 |
| 1997-08-11 | Canadian Open | R64 | hard | Ai Sugiyama | 6-4 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 (10 vs 172). ATP, WTA & Challenger.