Maria Constanza De Las Mercedes Vega defeated Carolina Costamagna 6-2 6-4 in the Asuncion 10K round of 32 on clay. The result followed the form book — Maria Constanza De Las Mercedes Vega came in leading the head-to-head 1–0. Maria Constanza De Las Mercedes Vega extended the head-to-head to 2–0.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 2013-04-29 | Villa Allende 10K | R16 | clay | Maria Constanza De Las Mercedes Vega | 6-2 6-2 |