Macall Harkins defeated Maria Fernanda Alvarez Teran 6-1 6-2 in the Metepec 10K qualifying round on hard. The upset overturned the form book — Maria Fernanda Alvarez Teran came in leading the head-to-head 3–0. Macall Harkins claimed a first win over Maria Fernanda Alvarez Teran in four meetings, narrowing the head-to-head to 3–1.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 2011-06-06 | El Paso TX 25K | R16 | hard | Maria Fernanda Alvarez Teran | 3-6 6-0 6-2 |
| 2010-04-19 | Poza Rica 25K | R16 | hard | Maria Fernanda Alvarez Teran | 7-5 6-4 |
| 2009-11-23 | Puebla 25K | R32 | hard | Maria Fernanda Alvarez Teran | 6-3 7-5 |
Averages over each player's completed matches in the selected window. ATP, WTA & Challenger.