Catarina Ferreira defeated Daria Petrovic 6-1 6-3 in the Alcobaca 10K qualifying round on hard. The upset overturned the form book — Daria Petrovic came in leading the head-to-head 1–0. Catarina Ferreira claimed a first win over Daria Petrovic in two meetings, narrowing the head-to-head to 1–1.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 2006-06-26 | Amarante 10K | R32 | hard | Daria Petrovic | 4-6 6-4 6-2 |