Martina Hingis defeated Sylvia Plischke 6-4 6-1 in the Hamburg round of 16 on clay. The result followed the form book — Martina Hingis came in leading the head-to-head 2–0. Martina Hingis extended the head-to-head to 3–0.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 1999-03-29 | Hilton Head | R32 | clay | Martina Hingis | 6-3 7-5 |
| 1998-08-17 | Canadian Open | R32 | hard | Martina Hingis | 6-4 6-1 |
Averages over each player's completed matches in the selected window. ATP, WTA & Challenger.