Ai Sugiyama defeated Julie Halard Decugis 6-4 6-2 in the Scottsdale round of 16 on hard. Ai Sugiyama extended the head-to-head to 2–1.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 1999-09-20 | Tokyo | QF | hard | Ai Sugiyama | 6-2 7-5 |
| 1998-10-12 | Zurich | R32 | hard | Julie Halard Decugis | 7-5 6-1 |
Averages over each player's completed matches in the selected window. ATP, WTA & Challenger.