| ITF W15 Piracicaba | 04/23 14:00 | 28 | Thaisa Grana Pedretti v Bianca Behulova | 1-6,4-6 | |
| ITF W15 Piracicaba | 04/22 15:55 | 27 | Thaisa Grana Pedretti v Fernanda Astete | 6-2,6-2 | |
| ITF W15 Piracicaba | 04/21 15:15 | 26 | Thaisa Grana Pedretti v Nikola Daubnerova | 6-0,6-1 | |
| ITF W15 Piracicaba | 04/20 15:20 | 25 | Thaisa Grana Pedretti v Olivia Carneiro | 6-0,6-0 | |
| ITF W25 Medellin | 03/22 15:00 | 24 | Noelia Zeballos v Thaisa Grana Pedretti | 6-3,3-6,6-3 | |
| ITF W25 Anapoima | 03/16 15:50 | 26 | [433] Thaisa Grana Pedretti v Reka-Luca Jani [137] | 2-6,4-6 | |
| ITF W25 Anapoima | 03/15 18:30 | 25 | Thaisa Grana Pedretti v Yuliana Monroy | 7-6,6-1 | |
| ITF W25 Florianopolis | 01/26 12:00 | 25 | Barbara Gatica v Thaisa Grana Pedretti | 6-3,7-6 | |
| ITF W25 Florianopolis | 01/19 11:50 | 25 | [434] Thaisa Grana Pedretti v Ana Sofia Sanchez [255] | 2-6,1-6 | |
| ITF W15 Curitiba | 12/05 13:30 | 29 | [289] Gabriela Ce v Thaisa Grana Pedretti [439] | Retired | |
| ITF W15 Curitiba | 12/04 14:00 | 28 | Nathaly Kurata v Thaisa Grana Pedretti | 3-6,4-6 | |
| ITF W15 Curitiba | 12/03 15:25 | 27 | Lara Escauriza v Thaisa Grana Pedretti | 5-7,6-7 | |
| ITF W15 Curitiba | 12/02 13:00 | 26 | Emily M D S Chang v Thaisa Grana Pedretti | 4-6,1-6 | |
| ITF W15 Curitiba | 11/30 18:25 | 25 | Helena Bueno v Thaisa Grana Pedretti | 0-6,1-6 | |
| ITF W60 Brasilia | 11/24 15:25 | 26 | [454] Thaisa Grana Pedretti v Xiaodi You [246] | 5-7,1-6 | |
| ITF W60 Brasilia | 11/22 16:30 | 25 | Thaisa Grana Pedretti v Julia Klimovicz | 6-2,6-2 | |
| ITF W25 Aparecida De Goiania | 11/11 12:00 | 26 | [461] Thaisa Grana Pedretti v Ana Sofia Sanchez [268] | 5-7,6-7 | |
| ITF W25 Aparecida De Goiania | 11/09 11:00 | 25 | Thaisa Grana Pedretti v Olivia Carneiro | 6-1,6-2 | |
| ITF W25 Rio do Sul | 10/21 13:50 | 26 | [455] Thaisa Grana Pedretti v Laura Pigossi [287] | 2-6,6-2,1-6 | |
| ITF W25 Rio do Sul | 10/20 13:20 | 25 | Juliana Munhoz v Thaisa Grana Pedretti | 4-6,3-6 | |
| ITF W25 Lima | 10/12 18:10 | 25 | Ziva Falkner v Thaisa Grana Pedretti | 6-3,5-7,6-2 | |
| ITF W25 Lima | 10/07 15:00 | 26 | [427] Thaisa Grana Pedretti v Carolina Alves [337] | 2-6,6-7 | |
| ITF W25 Lima | 10/05 16:15 | 25 | Maria Cristina Purizaca v Thaisa Grana Pedretti | 0-6,0-6 | |
| ITF W25 Medellin | 09/18 17:05 | 28 | [495] Thaisa Grana Pedretti v Emiliana Arango [386] | 0-6,2-6 | |
| ITF W25 Medellin | 09/17 18:00 | 27 | Jasmin Jebawy v Thaisa Grana Pedretti | 3-6,2-6 | |
| ITF W25 Medellin | 09/16 16:20 | 26 | [279] Rasheeda McAdoo v Thaisa Grana Pedretti [495] | 6-4,4-6,2-6 | |
| ITF W25 Medellin | 09/15 15:00 | 25 | Sabastiani Leon v Thaisa Grana Pedretti | 2-6,1-6 | |
| ITF W15 Ibague | 09/12 14:30 | 29 | [492] Thaisa Grana Pedretti v Yuliana Lizarazo [369] | Retired | |
| ITF W15 Ibague | 09/11 16:30 | 28 | Thaisa Grana Pedretti v Maria Paulina P-Garcia | 6-3,6-4 | |
| ITF W15 Ibague | 09/10 15:00 | 27 | Thaisa Grana Pedretti v Rushri Wijesundera | 6-4,6-3 |