Irina Spirlea defeated Conchita Martinez 6-2 7-6 in the Zurich round of 16 on hard. The upset overturned the form book — Conchita Martinez came in leading the head-to-head 2–0. Irina Spirlea claimed a first win over Conchita Martinez in three meetings, narrowing the head-to-head to 2–1.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 1999-11-01 | Leipzig | R32 | carpet | Conchita Martinez | 6-1 4-6 6-4 |
| 1998-10-05 | Filderstadt | R32 | hard | Conchita Martinez | 3-6 6-2 6-2 |
Averages over each player's completed matches in the selected window. ATP, WTA & Challenger.