| ITF Women Norman | 11/11 16:00 | - | Maria Jose Portillo Ramirez v Tiphanie Fiquet | 6-7,6-1,2-6 | |
| ITF Women Toronto | 10/28 14:00 | - | Joelle Kissell v Maria Jose Portillo Ramirez | 6-1,6-2 | |
| ITF Women Toronto | 10/27 15:50 | - | Maria Jose Portillo Ramirez v Safiya Carrington | 5-7,7-6,7-5 | |
| ITF Women Lagos | 10/09 10:45 | - | Conny Perrin v Maria Jose Portillo Ramirez | 6-3,6-2 | |
| ITF Women Lagos | 10/03 12:20 | - | Maria Jose P Ramirez v Victoria Bosio | 6-7,3-6 | |
| ITF Women Lagos | 10/01 12:15 | - | Fiona Codino v Maria Jose P Ramirez | 5-7,6-3,5-7 | |
| ITF Women Lubbock | 09/15 14:00 | - | Maria Jose Portillo Ramirez v Dominique Schaefer | 6-7,5-7 | |
| ITF Women Fort Worth | 08/02 14:10 | - | [333] Robin Anderson v Maria Jose P Ramirez [449] | 6-2,7-5 | |
| ITF Women Fort Worth | 07/31 18:55 | - | [449] Maria Jose P Ramirez v Nagi Hanatani [419] | 6-3,6-3 | |
| ITF Women Evansville | 07/26 15:40 | - | Niluka Madurawe v Maria Jose P Ramirez | 6-3,6-4 | |
| ITF Women Evansville | 07/24 17:55 | - | Brianda R Navarro v Maria Jose P Ramirez | 0-6,0-6 | |
| ITF Women Gatineau Qual | 07/15 14:10 | - | [463] Jodie Anna Burrage v Maria Jose P Ramirez [450] | 6-1,6-2 | |
| ITF Women Gatineau Qual | 07/14 16:55 | - | Jada Bui v Maria Jose P Ramirez | 5-7,3-6 | |
| 2018 Fed Cup | 06/21 14:00 | - | Maria Jose Portillo Ramirez v Tangia Riley-Codrington | 6-0,6-0 | |
| ITF Women Sumter | 06/13 18:15 | - | [448] Maria Jose Portillo Ramirez v Alize Lim [312] | 1-6,1-6 | |
| ITF Women Sumter Qual | 06/12 13:45 | - | Maria Jose Portillo Ramirez v Gianna Pielet | 6-2,6-3 | |
| ITF Women Sumter Qual | 06/11 13:00 | - | Maria Jose Portillo Ramirez v Peyton Stearns | 7-6,7-6 | |
| ITF Women Bethany Beach Qual | 06/05 13:10 | - | Maria Jose Portillo Ramirez v Elysia Bolton | 6-7,3-6 | |
| ITF Women Tacarigua | 05/12 15:00 | - | Maria Jose Portillo Ramirez v Andrea R Villarreal | 6-2,6-2 | |
| ITF Women Tacarigua | 05/11 17:10 | - | Maria Jose Portillo Ramirez v Csilla Fodor | 6-7,6-0,7-6 | |
| ITF Women Tacarigua | 05/10 15:00 | - | Emily Appleton v Maria Jose Portillo Ramirez | 4-6,4-6 | |
| ITF Women Tacarigua | 05/09 18:55 | - | Maria Jose Portillo Ramirez v Catherine Leduc | 6-4,6-2 | |
| ITF Women Pelham Qual | 04/09 15:00 | - | Maria Jose Portillo Ramirez v Andrea R Villarreal | 6-2,3-6,6-7 | |
| ITF Women Pelham Qual | 04/08 15:00 | - | Charity Johns v Maria Jose Portillo Ramirez | 0-6,0-6 | |
| ITF Women Irapuato | 03/13 22:20 | - | Maria Jose P Ramirez v Maria Sanchez | 1-6,1-6 | |
| ITF Women Campinas Qual | 03/05 14:50 | - | Stephanie Nemtsova v Maria Jose Portillo Ramirez | 6-2,6-3 | |
| ITF Women Campinas Qual | 03/04 14:00 | - | Marcela-Guimaraes Bueno v Maria Jose Portillo Ramirez | 2-6,1-6 | |
| ITF Women Campinas Qual | 03/03 14:00 | - | Leticia Giudici v Maria Jose Portillo Ramirez | 1-6,1-6 | |
| ITF Women Sao Paulo Qual | 02/25 13:00 | - | Eleni Kordolaimi v Maria Jose Portillo Ramirez | 7-5,6-4 | |
| ITF Women Sao Paulo Qual | 02/24 12:00 | - | Maria D R Vazquez v Maria Jose Portillo Ramirez | 3-6,4-6 |