Jenifer Widjaja defeated Frederica Piedade 6-4 1-6 6-3 in the Mexico City 3 25K round of 16 on clay. The upset overturned the form book — Frederica Piedade came in leading the head-to-head 5–2. Jenifer Widjaja narrowed the head-to-head to 5–3.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 2007-09-17 | Albuquerque NM 75K | R16 | hard | Jenifer Widjaja | 6-2 6-4 |
| 2006-10-09 | Saltillo 25K | QF | hard | Frederica Piedade | 6-3 6-2 |
| 2005-10-03 | Juarez 50K | SF | clay | Frederica Piedade | 6-1 1-6 6-4 |
| 2005-07-18 | Campos do Jordao 25K | QF | hard | Frederica Piedade | 7-6(2) 6-1 |
| 2005-03-14 | Morelia 10K | F | hard | Jenifer Widjaja | 1-6 6-4 7-5 |
| 2004-11-22 | San Luis Potosi 25K | R16 | hard | Frederica Piedade | 7-5 6-2 |
| 2004-11-15 | Puebla 25K | R16 | hard | Frederica Piedade | 6-1 6-3 |
Averages over each player's completed matches in the selected window. ATP, WTA & Challenger.