Stadium: Court 13 Round: 25 Ground: Clay
| ITF W25 Rio do Sul | 2021/10/21 13:50 | Thaisa Grana Pedretti v Laura Pigossi | 2-6,6-2,1-6 |
| ITF W25 Rio do Sul | 2021/10/20 13:20 | Juliana Munhoz v Thaisa Grana Pedretti | 4-6,3-6 |
| ITF W25 Lima | 2021/10/12 18:10 | Ziva Falkner v Thaisa Grana Pedretti | 6-3,5-7,6-2 |
| ITF W25 Lima | 2021/10/07 15:00 | Thaisa Grana Pedretti v Carolina Alves | 2-6,6-7 |
| ITF W25 Lima | 2021/10/05 16:15 | Maria Cristina Purizaca v Thaisa Grana Pedretti | 0-6,0-6 |
| ITF W25 Medellin | 2021/09/18 17:05 | Thaisa Grana Pedretti v Emiliana Arango | 0-6,2-6 |
| ITF W25 Medellin | 2021/09/17 18:00 | Jasmin Jebawy v Thaisa Grana Pedretti | 3-6,2-6 |
| ITF W25 Medellin | 2021/09/16 16:20 | Rasheeda McAdoo v Thaisa Grana Pedretti | 6-4,4-6,2-6 |