| ITF W35 Buenos Aires | 01/22 12:15 | 54 | Catarina Melleiro v Julia Caffarena | 6-0,6-7,2-10 | |
| ITF W35 Buenos Aires | 01/21 12:30 | 54 | Catarina M I Melleiro Junior v Alice Ghiraldi | 6-4,6-4 | |
| ITF W35 Buenos Aires | 01/17 13:00 | 25 | Jazmin Ortenzi v Catarina Melleiro | 6-3,6-1 | |
| ITF W35 Buenos Aires | 01/15 12:30 | 54 | Catarina Melleiro v Leticia Garcia Vidal | 3-6,1-6 | |
| ITF W60 Vacaria | 12/11 16:50 | 54 | Catarina Melleiro v Maria P Perez-Garcia | 1-6,2-6 | |
| ITF W60 Vacaria | 12/10 17:20 | 54 | Catarina Melleiro v Yasmin B De Aguirres | 6-1,6-2 | |
| ITF W25 Mogi Das Cruzes | 12/06 16:10 | 25 | Ana Sofia Sanchez v Catarina Melleiro | 6-0,6-0 | |
| ITF W15 Cordoba | 11/22 14:50 | 25 | Catarina Melleiro v Martina M Bovio | 7-6,1-6,2-6 | |
| ITF W25 Mendoza | 10/02 16:00 | 62 | Katja Markus v Catarina M I Melleiro Junior | 6-2,6-2 | |
| ITF W25 Lujan | 09/25 13:00 | 54 | Lara Diaz Zayas v Catarina Melleiro | 7-5,7-5 | |
| ITF W15 Lima | 08/22 15:00 | 25 | Carolina Alvarez v Catarina Melleiro | 1-6,6-2,6-1 | |
| ITF W40 Arequipa | 08/16 14:30 | 25 | Valeriya Strakhova v Catarina Melleiro | 6-0,6-3 | |
| ITF W40 Arequipa | 08/13 16:25 | 54 | Catarina Melleiro v Sofiya Lebedeva | 6-3,6-0 | |
| ITF W80 Brasilia | 08/06 14:45 | 54 | Catarina M I M Junior v Rebeca Pereira | 1-6,5-7 | |
| ITF W60 Feira De Santana | 07/31 17:00 | 54 | Catarina M I Melleiro Junior v Leticia Garcia Vidal | 6-7,1-6 | |
| ITF W60 Feira De Santana | 07/30 16:00 | 54 | Catarina M I Melleiro Junior v Althea Hudson | Retired | |
| ITF W15 Rosario | 06/27 14:25 | 25 | Marina Bulbarella v Catarina M I Melleiro Junior | 7-5,4-6,6-3 | |
| ITF W15 Buenos Aires | 06/22 13:00 | 26 | Catarina M I Melleiro Junior v Sol A Larraya Guidi | 4-6,4-6 | |
| ITF W15 Buenos Aires | 06/20 15:00 | 25 | Camila Romero v Catarina M I Melleiro Junior | 5-7,4-6 | |
| ITF W15 Recife | 05/24 15:15 | 25 | Catarina M I Melleiro Junior v Sabastiani Leon | 0-6,0-6 | |
| ITF W15 Curitiba | 05/17 20:50 | 25 | Catarina M I Melleiro Junior v Ana Candiotto | 3-6,0-6 | |
| ITF W60 Rio de Janeiro | 11/27 14:20 | 54 | Catarina M I Melleiro Junior v F Maguina Bunikowska | 6-7,6-3,12-14 | |
| ITF W15 Lima | 11/17 17:30 | 26 | Catarina M I Melleiro Junior v Sofia Sewing | 4-6,3-6 | |
| ITF W15 Lima | 11/15 19:45 | 25 | Catarina M I Melleiro Junior v Marina Bulbarella | 6-1,4-6,6-3 | |
| ITF W15 Lima | 11/10 20:10 | 26 | Sofia Sewing v Catarina M I Melleiro Junior | 6-2,6-4 | |
| ITF W15 Lima | 11/08 19:15 | 25 | Catarina M I Melleiro Junior v Elizaveta Castillo | 0-6,6-3,6-3 | |
| ITF W25 Tucuman | 10/10 17:10 | 24 | Chiara Di Genova v Catarina M I Melleiro Junior | 6-4,6-3 | |
| ITF W15 Cancun | 09/27 15:40 | 25 | Sara A Seivane Torres v Catarina M I Melleiro Junior | 7-6,6-1 | |
| ITF W15 Cancun | 09/20 15:00 | 25 | Catarina M I M Junior v Anna Ulyashchenko | 1-6,1-6 | |
| ITF W15 Cancun | 09/13 15:00 | 44 | Catarina M I Melleiro Junior v Elizabeth Tkachenko | 6-7,1-6 |