Matea Mezak defeated Andrea Sieveke 6-3 6-4 in the La Palma 25K round of 32 on hard. The upset overturned the form book — Andrea Sieveke came in leading the head-to-head 1–0. Matea Mezak claimed a first win over Andrea Sieveke in two meetings, narrowing the head-to-head to 1–1.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 2006-06-05 | Grado 25K | R16 | clay | Andrea Sieveke | 7-5 4-6 6-2 |