Martina Hingis defeated Karina Habsudova 6-1 6-4 in the Key Biscayne round of 64 on hard. The result followed the form book — Martina Hingis came in leading the head-to-head 2–0, defending last year's semi-final. Martina Hingis extended the head-to-head to 3–0.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 1998-05-25 | Roland Garros | R32 | clay | Martina Hingis | 6-3 6-2 |
| 1997-03-01 | Fed Cup WG2 QF: SVK vs SUI | RR | carpet | Martina Hingis | 6-2 6-0 |
Averages over each player's completed matches in the selected window. ATP, WTA & Challenger.