Stadium: Court 2 Round: 62 Ground: Clay
| ITF W15 Rosario | 2023/06/27 12:00 | Katja Markus v Michela Castro Zunino | 3-6,2-6 |
| ITF W15 Buenos Aires | 2023/06/19 13:30 | Katja Markus v Michela Castro Zunino | 7-6,1-6,3-10 |
| ITF W15 Recife | 2023/05/24 17:50 | Katja Markus v Alessandra Caceres | 4-6,4-6 |
| ITF W15 Curitiba | 2023/05/16 13:00 | Katja Markus v Isabel Oliveira | 7-5,1-6,8-10 |
| ITF W15 Curitiba | 2023/05/15 16:00 | Katja Markus v Bianca G Lampert | 4-6,6-0,10-4 |
| ITF W25 Guayaquil Qual | 2023/04/23 19:25 | Amanda C Nava Elkin v Katja Markus | 6-0,6-0 |
| ITF W25 Guayaquil | 2023/04/16 15:00 | Katja Markus v Ena Koike | 0-6,0-6 |
| ITF W25 Tucuman | 2023/02/28 14:55 | Katja Markus v Carla Markus | 1-6,5-7 |
| ITF W15 Rosario | 2023/06/27 14:25 | Marina Bulbarella v Catarina M I Melleiro Junior | 7-5,4-6,6-3 |
| ITF W15 Buenos Aires | 2023/06/22 13:00 | Catarina M I Melleiro Junior v Sol A Larraya Guidi | 4-6,4-6 |
| ITF W15 Buenos Aires | 2023/06/20 15:00 | Camila Romero v Catarina M I Melleiro Junior | 5-7,4-6 |
| ITF W15 Recife | 2023/05/24 15:15 | Catarina M I Melleiro Junior v Sabastiani Leon | 0-6,0-6 |
| ITF W15 Curitiba | 2023/05/17 20:50 | Catarina M I Melleiro Junior v Ana Candiotto | 3-6,0-6 |
| ITF W60 Rio de Janeiro | 2022/11/27 14:20 | Catarina M I Melleiro Junior v Francesca Maguina Bunikowska | 6-7,6-3,12-14 |
| ITF W15 Lima | 2022/11/17 17:30 | Catarina M I Melleiro Junior v Sofia Sewing | 4-6,3-6 |
| ITF W15 Lima | 2022/11/15 19:45 | Catarina M I Melleiro Junior v Marina Bulbarella | 6-1,4-6,6-3 |