Arantxa Sanchez Vicario defeated Mercedes Paz 6-2 6-0 in the Barcelona 25K round of 16 on clay. The upset overturned the form book — Mercedes Paz came in leading the head-to-head 1–0. Arantxa Sanchez Vicario claimed a first win over Mercedes Paz in two meetings, narrowing the head-to-head to 1–1.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 1990-05-28 | Roland Garros | R64 | clay | Mercedes Paz | 7-5 3-6 6-1 |