| ITF W15 Cancun | 04/18 15:45 | 26 | Maria Jose P Ramirez v Shelly Bereznyak | 6-1,6-0 | |
| ITF W15 Cancun | 04/17 14:00 | 25 | Maria Jose P Ramirez v Angeles M-Barranquero | 6-3,6-7,6-3 | |
| ITF W15 Cancun | 04/13 15:00 | 28 | Maria Jose Portillo Ramirez v Natsumi Kawaguchi | 6-4,3-6,6-7 | |
| ITF W15 Cancun | 04/12 14:30 | 27 | Maria Jose Portillo Ramirez v Maya Tahan | 6-4,6-3 | |
| ITF W15 Cancun | 04/11 16:00 | 26 | Maria Jose Portillo Ramirez v Stephanie Kent | 6-4,7-5 | |
| ITF W15 Cancun | 04/10 17:20 | 25 | Maria Jose Portillo Ramirez v Yureni Reyna Gomez | 6-0,6-0 | |
| ITF W15 Cancun | 03/29 15:55 | 27 | [469] Maria Jose Portillo Ramirez v Montserrat Gonzalez [455] | 5-7,1-6 | |
| ITF W15 Cancun | 03/28 14:00 | 26 | Maria Jose Portillo Ramirez v Josephine Boualem | 1-6,7-6,6-2 | |
| ITF W15 Cancun | 03/27 18:10 | 25 | Maria Jose Portillo Ramirez v Olga Parres Azcoitia | 6-1,6-4 | |
| ITF W15 Cancun | 03/19 19:00 | 25 | Dominique Schaefer v Maria Jose Portillo Ramirez | 2-6,7-6,7-5 | |
| ITF W15 Cancun | 03/12 15:55 | 25 | Maria Jose P Ramirez v Lea Ma | 2-6,4-6 | |
| ITF W25 Irapuato | 03/04 19:30 | 45 | Andrea Gamiz v Maria Jose Portillo Ramirez | 6-2,7-5 | |
| WTA Acapulco | 02/23 23:40 | 45 | [148] Conny Perrin v Maria Jose Portillo Ramirez [478] | 6-1,6-1 | |
| 2019 Fed Cup | 02/09 15:00 | 29 | [478] Maria Jose P Ramirez v Alexa Guarachi [394] | 3-6,5-7 | |
| ITF Women Norman | 11/11 16:00 | 62 | Maria Jose Portillo Ramirez v Tiphanie Lemaitre | 6-7,6-1,2-6 | |
| ITF Women Norman | 11/10 18:30 | 62 | Maria Jose Portillo Ramirez v Holly Hutchinson | 6-2,6-1 | |
| ITF Women Toronto | 10/28 14:00 | 54 | Joelle Kissell v Maria Jose Portillo Ramirez | 6-1,6-2 | |
| ITF Women Toronto | 10/27 15:50 | 54 | Maria Jose Portillo Ramirez v Safiya Carrington | 5-7,7-6,7-5 | |
| ITF Women Lagos | 10/09 10:30 | 25 | Conny Perrin v Maria Jose Portillo Ramirez | 6-3,6-2 | |
| ITF Women Lagos | 10/03 12:00 | 26 | Maria Jose P Ramirez v Victoria Bosio | 6-7,3-6 | |
| ITF Women Lagos | 10/01 12:05 | 25 | Fiona Codino v Maria Jose P Ramirez | 5-7,6-3,5-7 | |
| ITF Women Lubbock | 09/15 14:00 | 62 | Maria Jose Portillo Ramirez v Dominique Schaefer | 6-7,5-7 | |
| ITF Women Fort Worth | 08/02 14:00 | 26 | [333] Robin Anderson v Maria Jose P Ramirez [449] | 6-2,7-5 | |
| ITF Women Fort Worth | 07/31 18:55 | 25 | [449] Maria Jose P Ramirez v Nagi Hanatani [419] | 6-3,6-3 | |
| ITF Women Evansville | 07/26 15:40 | 26 | Niluka Madurawe v Maria Jose P Ramirez | 6-3,6-4 | |
| ITF Women Evansville | 07/24 14:00 | 25 | Brianda R Navarro v Maria Jose P Ramirez | 0-6,0-6 | |
| ITF Women Gatineau Qual | 07/15 14:00 | 54 | [463] Jodie Anna Burrage v Maria Jose P Ramirez [450] | 6-1,6-2 | |
| ITF Women Gatineau Qual | 07/14 16:55 | 54 | 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 | 25 | [448] Maria Jose Portillo Ramirez v Alize Lim [312] | 1-6,1-6 |