Guadalupe Moreno defeated Tatiana Bua 7-6 0-6 6-4 in the La Paz 10K round of 16 on clay. The upset overturned the form book — Tatiana Bua came in leading the head-to-head 4–0, but Guadalupe Moreno had been the form player, winning 2 of their last 4 on clay. Guadalupe Moreno claimed a first win over Tatiana Bua in five meetings, narrowing the head-to-head to 4–1.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 2012-04-09 | Villa Del Dique 10K | R16 | clay | Tatiana Bua | 6-3 6-3 |
| 2010-08-02 | Santa Cruz 10K | QF | clay | Tatiana Bua | 6-2 6-0 |
| 2008-08-18 | Bell Ville 10K | R16 | clay | Tatiana Bua | 6-4 6-2 |
| 2008-07-21 | Brasilia 10K | R16 | clay | Tatiana Bua | 5-7 6-1 6-2 |