Mary Pierce defeated Sabine Appelmans 6-3 7-6 in the US Open round of 16 on hard. The result followed the form book — Mary Pierce came in leading the head-to-head 4–0, defending last year's round of 16. Mary Pierce extended the head-to-head to 5–0.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 1998-10-20 | Kremlin Cup | R16 | carpet | Mary Pierce | 6-2 6-2 |
| 1998-05-25 | Roland Garros | R128 | clay | Mary Pierce | 6-2 6-3 |
| 1997-11-17 | WTA Tour Championships | R16 | carpet | Mary Pierce | 6-3 6-4 |
| 1997-01-13 | Australian Open | QF | hard | Mary Pierce | 1-6 6-4 6-4 |
Averages over each player's completed matches in the selected window. ATP, WTA & Challenger.