Maria Sol Rotondo defeated Karen Castiblanco 6-3 6-4 in the Cordoba 10K round of 32 on clay. The upset overturned the form book — Karen Castiblanco came in leading the head-to-head 1–0. Maria Sol Rotondo claimed a first win over Karen Castiblanco in two meetings, narrowing the head-to-head to 1–1.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 2006-11-13 | Florianopolis 10K | R16 | clay | Karen Castiblanco | 3-6 6-2 6-4 |