Stadium: Court 12 Round: 25 Ground: Clay
| ITF W15 Buenos Aires | 2019/09/13 14:30 | Guillermina Naya v Thaisa Grana Pedretti | 6-4,6-4 |
| ITF Women Sao Paulo | 2017/03/07 17:05 | Thaisa Grana Pedretti v Guillermina Naya | 6-2,6-2 |
| ITF W60 Asuncion | 2019/10/28 20:20 | Guillermina Naya v Nathaly Kurata | 7-5,6-3 |
| ITF W60 Asuncion | 2019/10/28 15:50 | Cindy Burger v Guillermina Naya | 6-3,5-7,6-10 |
| ITF W15 Buenos Aires | 2019/10/13 17:00 | Jazmin Ortenzi v Guillermina Naya | 3-6,5-7 |
| ITF W15 Buenos Aires | 2019/10/13 13:30 | Guillermina Naya v Eduarda Piai | 6-3,6-0 |
| ITF W15 Buenos Aires | 2019/10/11 19:30 | Guillermina Naya v Eugenia Ganga | 6-2,6-3 |
| ITF W15 Buenos Aires | 2019/10/10 13:00 | Guillermina Naya v Maria J Amicuzi | 6-2,6-4 |
| ITF W15 Buenos Aires | 2019/10/09 18:25 | Guillermina Naya v Rocio D Merlo | 6-0,6-2 |
| ITF W15 Buenos Aires | 2019/09/21 14:00 | Julieta Lara Estable v Guillermina Naya | 4-6,6-4,6-1 |
| ITF W60 Asuncion | 2019/10/28 17:25 | Thaisa Grana Pedretti v Maria F Herazo Gonzalez | 6-2,6-2 |
| ITF W60 Asuncion | 2019/10/28 12:55 | Thaisa Grana Pedretti v Carlota M P Sanchez | 6-1,6-0 |
| ITF W25 Dallas | 2019/10/22 18:20 | Jamie Loeb v Thaisa Grana Pedretti | 7-5,6-3 |
| ITF W25 Waco | 2019/10/17 17:15 | Thaisa Grana Pedretti v Leylah Annie Fernandez | 4-6,3-6 |
| ITF W25 Waco | 2019/10/16 16:10 | Hadley Doyle v Thaisa Grana Pedretti | 3-6,3-6 |
| ITF W25 Claremont | 2019/10/13 17:00 | Katie Swan v Thaisa Grana Pedretti | 6-1,6-3 |
| ITF W25 Claremont | 2019/10/12 20:55 | Thaisa Grana Pedretti v Danielle Lao | 6-4,4-6,7-6 |
| ITF W25 Claremont | 2019/10/11 20:45 | Thaisa Grana Pedretti v Katherine Sebov | 6-7,7-5,7-5 |