Jenifer Widjaja defeated Maria Jose Argeri 6-1 6-1 in the Guayaquil 10K qualifying round on hard. The upset overturned the form book — Maria Jose Argeri came in leading the head-to-head 2–1. Jenifer Widjaja 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 |
| 2006-04-10 | San Luis Potosi 25K | SF | clay | Maria Jose Argeri | 6-4 6-2 |
| 2003-09-08 | Santiago 10K | F | clay | Maria Jose Argeri | 7-5 6-1 |