Patty Schnyder defeated Mariaan De Swardt 6-3 6-2 in the Hilton Head round of 16 on clay. The result followed the form book — Patty Schnyder came in leading the head-to-head 2–0, defending last year's round of 32. Patty Schnyder extended the head-to-head to 3–0.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 1999-03-18 | Key Biscayne | R64 | hard | Patty Schnyder | 6-3 6-3 |
| 1998-04-06 | Amelia Island | R32 | clay | Patty Schnyder | 6-3 6-4 |
Averages over each player's completed matches in the selected window. ATP, WTA & Challenger.