Maria Constanza De Las Mercedes Vega defeated Sofia Luini 6-2 6-2 in the Villa Allende 10K qualifying round on clay. The upset overturned the form book — Sofia Luini came in leading the head-to-head 2–1. Maria Constanza De Las Mercedes Vega narrowed the head-to-head to 2–2.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 2015-09-21 | San Carlos $10K | R32 | clay | Sofia Luini | 7-6(4) 7-6(2) |
| 2014-10-13 | Lima 10K | R32 | clay | Sofia Luini | 2-6 7-5 6-2 |
| 2013-05-06 | Villa Maria 10K | R16 | clay | Maria Constanza De Las Mercedes Vega | 6-2 6-3 |
Averages over each player's completed matches in the selected window. ATP, WTA & Challenger.