Estefania Balda Alvarez defeated Mariana Duque Marino 6-0 7-6 in the Santa Cruz De La Sierra 10K round of 32 on clay. The upset overturned the form book — Mariana Duque Marino came in leading the head-to-head 1–0. Estefania Balda Alvarez claimed a first win over Mariana Duque Marino in two meetings, narrowing the head-to-head to 1–1.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 2005-09-05 | Santiago 10K | R32 | clay | Mariana Duque Marino | 6-1 6-2 |
Averages over each player's completed matches in the selected window. ATP, WTA & Challenger.