Mariaan De Swardt defeated Sandrine Testud 6-3 6-2 in the Roland Garros round of 64 on clay. The upset overturned the form book — Sandrine Testud came in leading the head-to-head 1–0, defending last year's round of 16. Mariaan De Swardt claimed a first win over Sandrine Testud in two meetings, narrowing the head-to-head to 1–1.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 1999-08-16 | Canadian Open | R64 | hard | Sandrine Testud | 6-4 RET |
Averages over each player's completed matches in the selected window. ATP, WTA & Challenger.