Maria Jose Argeri defeated Jenifer Widjaja 6-4 6-2 in the San Luis Potosi 25K semi-final on clay. The upset overturned the form book — Jenifer Widjaja came in leading the head-to-head 2–1. Maria Jose Argeri narrowed the head-to-head to 2–2.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 2006-10-02 | San Luis Potosi 25K | SF | hard | Jenifer Widjaja | 6-2 0-6 6-2 |
| 2004-08-16 | Guayaquil 10K | QF | hard | Jenifer Widjaja | 6-1 6-1 |
| 2003-09-08 | Santiago 10K | F | clay | Maria Jose Argeri | 7-5 6-1 |