| ITF W60 Rio de Janeiro | 11/28 20:00 | 25 | [289] Xiaodi You v Thaisa Grana Pedretti [484] | 6-3,6-2 | |
| ITF W60 Barranquilla | 11/02 22:35 | 25 | [469] Thaisa Grana Pedretti v Xiaodi You [254] | 2-6,4-6 | |
| ITF W60 Barranquilla | 11/01 16:50 | 24 | [469] Thaisa Grana Pedretti v Tiphanie Fiquet [478] | 6-1,6-0 | |
| ITF W25 Ibague | 10/27 16:00 | 26 | [443] Thaisa Grana Pedretti v Julia Riera [277] | 4-6,6-2,2-6 | |
| ITF W25 Ibague | 10/26 18:05 | 25 | Maria C T Murcia v Thaisa Grana Pedretti | 1-6,1-6 | |
| ITF W60 Macon | 10/22 16:30 | 28 | [460] Thaisa Grana Pedretti v Panna Udvardy [81] | 5-7,6-7 | |
| ITF W60 Macon | 10/21 14:55 | 27 | [212] Nadia Podoroska v Thaisa Grana Pedretti [460] | 6-7,4-6 | |
| ITF W60 Macon | 10/20 15:00 | 26 | Thaisa Grana Pedretti v Olivia Lincer | 6-1,6-0 | |
| ITF W60 Macon | 10/18 18:30 | 25 | [365] Adriana Reami v Thaisa Grana Pedretti [460] | 6-4,3-6,2-6 | |
| ITF W25 Florencia | 10/13 14:45 | 26 | [336] Ana Sofia Sanchez v Thaisa Grana Pedretti [472] | 6-2,6-7,6-0 | |
| ITF W25 Florencia | 10/11 17:20 | 25 | [425] Katarina Jokic v Thaisa Grana Pedretti [472] | 2-6,6-4,1-6 | |
| ITF W25 Redding | 10/05 19:15 | 25 | Thaisa Grana Pedretti v Charlotte Chavatipon | 5-7,4-6 | |
| ITF W15 Cancún | 09/29 15:35 | 26 | Thaisa Grana Pedretti v Mayu Crossley | 6-7,6-0,2-6 | |
| ITF W15 Cancún | 09/28 16:15 | 25 | Thaisa Grana Pedretti v Ximena Senties | 6-1,6-0 | |
| ITF W15 Cancún | 09/23 17:00 | 27 | Thaisa Grana Pedretti v Kaitlin Quevedo | 6-4,4-6,0-6 | |
| ITF W15 Cancún | 09/22 22:05 | 26 | Thaisa Grana Pedretti v Mia Kupres | 7-5,6-1 | |
| ITF W15 Cancún | 09/21 16:05 | 25 | Thaisa Grana Pedretti v Louise Kwong | 6-0,6-0 | |
| ITF W15 Cancún | 09/18 14:00 | 29 | Thaisa Grana Pedretti v Kaitlin Quevedo | 4-6,3-6 | |
| ITF W15 Cancún | 09/17 14:00 | 28 | Thaisa Grana Pedretti v Maria G Rivera Corado | 7-5,6-4 | |
| ITF W15 Cancún | 09/16 14:00 | 27 | Thaisa Grana Pedretti v Ena Koike | 6-0,6-3 | |
| ITF W15 Cancún | 09/15 20:35 | 26 | Thaisa Grana Pedretti v Johanne C Svendsen | 6-2,6-2 | |
| ITF W15 Cancún | 09/14 16:15 | 25 | Thaisa Grana Pedretti v Kariann Pierre-Louis | 6-1,6-0 | |
| ITF W25 Río de Janeiro | 08/06 15:10 | 28 | [322] Gabriela Ce v Thaisa Grana Pedretti [440] | 6-4,6-1 | |
| ITF W25 Río de Janeiro | 08/05 13:00 | 27 | Thaisa Grana Pedretti v Camilla Bossi | Retired | |
| ITF W25 Río de Janeiro | 08/04 12:55 | 26 | Thaisa Grana Pedretti v Sthefany Rodrigues De Lima | 6-1,6-1 | |
| ITF W25 Río de Janeiro | 08/02 18:45 | 25 | [440] Thaisa Grana Pedretti v Rebeca Pereira [208] | 6-2,6-1 | |
| ITF W15 Curitiba | 05/04 22:00 | 25 | Thaisa Grana Pedretti v Isabela A Mercante | Cancelled | |
| ITF W15 São Paulo | 04/29 13:00 | 27 | Thaisa Grana Pedretti v Nadine Keller | 5-7,6-1,2-6 | |
| ITF W15 São Paulo | 04/28 15:15 | 26 | Thaisa Grana Pedretti v Bianca Behulova | 6-3,6-3 | |
| ITF W15 São Paulo | 04/27 19:00 | 25 | Thaisa Grana Pedretti v Aline M Da Silva | 6-2,6-2 |