Stadium: Court 6 Round: 54 Ground: Clay
| ITF W25 Aparecida De Goiania | 2021/11/07 14:00 | Giulia Pereira De Aguiar v Maria Eduarda Lages | 1-6,6-4,3-10 |
| ITF W15 Piracicaba | 2021/10/11 14:00 | Helena Bueno v Giulia Pereira De Aguiar | 6-3,6-3 |
| ITF W25 Aparecida De Goiania | 2021/11/11 14:00 | Panna Udvardy v Doldan, Heydi | 6-0,6-0 |
| ITF W25 Aparecida De Goiania | 2021/11/10 12:00 | Galvao Borges, Mariana v Doldan, Heydi | 0-6,0-6 |
| ITF W25 Aparecida De Goiania | 2021/11/08 12:00 | Doldan, Heydi v Luiza Caixeta Parreira | 6-1,6-0 |
| ITF W25 Rio do Sul | 2021/10/20 12:00 | Maria Eduarda Lages v Doldan, Heydi | 6-3,6-1 |
| ITF W15 Piracicaba | 2021/10/14 13:30 | Victoria Bosio v Doldan, Heydi | 6-1,6-3 |
| ITF W15 Piracicaba | 2021/10/13 15:25 | Doldan, Heydi v Aglaya Zaynieva | 6-2,6-3 |
| ITF W25 Medellin | 2021/09/13 17:30 | Doldan, Heydi v Carrillo, Daniela | 0-6,3-6 |
| ITF W15 Ibague | 2021/09/07 16:30 | Samudio, Antonia v Doldan, Heydi | 6-1,6-2 |