| ITF - W15 Cancun | 02/07 14:00 | 27 | Thaisa Grana Pedretti v Ingrid G Martins | 4-6,1-6 | |
| ITF - W15 Cancun | 02/06 13:55 | 26 | Thaisa Grana Pedretti v Stacey Fung | 2-6,6-3,6-3 | |
| ITF - W15 Cancun | 02/05 17:40 | 25 | Thaisa Grana Pedretti v Hind Abdelouahid | 7-5,6-4 | |
| ITF W60 Colina | 11/04 15:25 | 54 | Thaisa Grana Pedretti v Solana Sierra | 4-6,6-2,6-10 | |
| ITF W60 Asuncion | 10/30 19:00 | 25 | Guillermina Naya v Thaisa Grana Pedretti | 6-1,6-4 | |
| ITF W60 Asuncion | 10/28 17:25 | 54 | [415] Thaisa Grana Pedretti v Maria F Herazo Gonzalez [351] | 6-2,6-2 | |
| ITF W60 Asuncion | 10/28 12:55 | 54 | Thaisa Grana Pedretti v Carlota M P Sanchez | 6-1,6-0 | |
| ITF - W25 Dallas | 10/22 18:20 | 25 | [344] Jamie Loeb v Thaisa Grana Pedretti [415] | 7-5,6-3 | |
| ITF W25 Waco | 10/17 17:15 | 26 | [488] Thaisa Grana Pedretti v Leylah Annie Fernandez [248] | 4-6,3-6 | |
| ITF W25 Waco | 10/16 16:10 | 25 | Hadley Doyle v Thaisa Grana Pedretti | 3-6,3-6 | |
| ITF W25 Claremont | 10/13 17:00 | 29 | [263] Katie Swan v Thaisa Grana Pedretti [486] | 6-1,6-3 | |
| ITF W25 Claremont | 10/12 20:55 | 28 | [486] Thaisa Grana Pedretti v Danielle Lao [208] | 6-4,4-6,7-6 | |
| ITF W25 Claremont | 10/11 20:45 | 27 | [486] Thaisa Grana Pedretti v Katherine Sebov [202] | 6-7,7-5,7-5 | |
| ITF W25 Claremont | 10/10 18:00 | 26 | [486] Thaisa Grana Pedretti v Kayla Day [370] | Retired | |
| ITF W25 Claremont | 10/09 18:40 | 25 | [277] Jodie Anna Burrage v Thaisa Grana Pedretti [486] | 3-6,5-7 | |
| ITF - W15 Sao Paulo | 09/29 14:15 | 29 | Carolina M R Alves v Thaisa Grana Pedretti | 7-5,6-1 | |
| ITF - W15 Sao Paulo | 09/28 14:15 | 28 | Thaisa Grana Pedretti v Barbara Gatica | 6-1,4-6,6-3 | |
| ITF - W15 Sao Paulo | 09/27 14:00 | 27 | Eugenia Ganga v Thaisa Grana Pedretti | 2-6,4-6 | |
| ITF - W15 Sao Paulo | 09/26 14:00 | 26 | Heydi Doldan v Thaisa Grana Pedretti | 2-6,3-6 | |
| ITF - W15 Sao Paulo | 09/24 13:00 | 25 | Vitoria De Brito Francisco v Thaisa Grana Pedretti | 1-6,0-6 | |
| ITF - W15 Buenos Aires | 09/21 14:00 | 28 | Thaisa Grana Pedretti v Maria Lourdes Carle | 4-6,3-6 | |
| ITF - W15 Buenos Aires | 09/20 15:00 | 27 | Thaisa Grana Pedretti v Maria P Perez-Garcia | 6-0,6-4 | |
| ITF - W15 Buenos Aires | 09/19 13:45 | 26 | Thaisa Grana Pedretti v Sofia Luini | 6-1,6-1 | |
| ITF - W15 Buenos Aires | 09/18 15:05 | 25 | Thaisa Grana Pedretti v Julia Riera | 6-0,6-0 | |
| ITF - W15 Buenos Aires | 09/13 14:30 | 27 | Guillermina Naya v Thaisa Grana Pedretti | 6-4,6-4 | |
| ITF - W15 Buenos Aires | 09/12 14:10 | 26 | Victoria Ariadna Beccio v Thaisa Grana Pedretti | 1-6,0-6 | |
| ITF - W15 Buenos Aires | 09/11 14:10 | 25 | Delfina Glorioso v Thaisa Grana Pedretti | 2-6,2-6 | |
| ITF - W25 Guayaquil | 08/22 15:00 | 26 | Charlotte Roemer v Thaisa Grana Pedretti | 6-1,6-3 | |
| ITF - W25 Guayaquil | 08/20 17:30 | 25 | Sofia Sewing v Thaisa Grana Pedretti | 2-6,0-6 | |
| ITF - W15 Cancun | 08/04 15:15 | 29 | Anna Morgina v Thaisa Grana Pedretti | Retired |