Irina Spirlea defeated Mary Pierce 6-4 6-2 in the Cairo quarter-final on clay. The upset overturned the form book — Mary Pierce came in leading the head-to-head 3–0. Irina Spirlea claimed a first win over Mary Pierce in four meetings, narrowing the head-to-head to 3–1.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 1999-10-25 | Linz | QF | hard | Mary Pierce | 3-6 6-2 6-3 |
| 1999-01-03 | Hope Island | SF | hard | Mary Pierce | 4-6 6-4 6-1 |
| 1997-01-06 | Sydney | R32 | hard | Mary Pierce | 6-3 4-6 6-4 |
Averages over each player's completed matches in the selected window. ATP, WTA & Challenger.