Patty Schnyder defeated Mariaan De Swardt 6-3 6-3 in the Key Biscayne round of 64 on hard. The result followed the form book — Patty Schnyder came in leading the head-to-head 2–0, defending last year's round of 16. Patty Schnyder extended the head-to-head to 3–0.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 1998-04-06 | Amelia Island | R32 | clay | Patty Schnyder | 6-3 6-4 |
| 1998-03-30 | Hilton Head | R16 | clay | Patty Schnyder | 6-3 6-2 |
Averages over each player's completed matches in the selected window. ATP, WTA & Challenger.