| Fed Cup, Groupe Mondial | 2018/02/09 17:00 | Guarachi Mathison, Alexa v Emiliana Arango | 2-6,6-7 |
| Fed Cup, Groupe Mondial | 2018/02/08 17:00 | Gonzalez, Montserrat v Guarachi Mathison, Alexa | 6-3,5-7,7-5 |
| ITF Women Midland Qual | 2018/01/28 18:45 | Jovic, J. v Guarachi Mathison, Alexa | 7-6,6-3 |
| WTA Newport Beach Qual | 2018/01/20 19:40 | Daniela Seguel v Guarachi Mathison, Alexa | 6-3,6-4 |
| ITF Women Orlando Qual | 2018/01/14 21:00 | Fernandez, Leylah Annie v Guarachi Mathison, Alexa | 7-6,6-4 |
| Daytona Beach, Singles Qualifying W-WITF-USA-01A | 2018/01/07 16:30 | van Nguyen, Chanelle v Guarachi Mathison, Alexa | 6-4,6-4 |
| ITF Women Dubai Qual | 2017/12/10 08:15 | Guarachi Mathison, Alexa v Fiona Ferro | 1-6,1-6 |
| ITF Women Dubai Qual | 2017/12/09 11:50 | Marozava, Lidziya v Guarachi Mathison, Alexa | 6-4,6-7,2-6 |
| Fed Cup, Groupe Mondial | 2018/02/09 17:00 | Uzcategui, Aymet v Schippers, Daniela | 6-7,6-3,7-6 |
| Fed Cup, Groupe Mondial | 2018/02/08 17:00 | Paula Ormaechea v Uzcategui, Aymet | 6-4,1-6,6-1 |
| Fed Cup, Groupe Mondial | 2018/02/07 17:00 | Gabriela Ce v Uzcategui, Aymet | 2-6,6-2,5-7 |
| Wesley Chapel, Singles Qualifying W-WITF-USA-03A | 2018/01/21 16:30 | Uzcategui, Aymet v Hendler, Tamaryn | 3-6,3-6 |
| Orlando, Singles Qualifying W-WITF-USA-02A | 2018/01/17 19:30 | Julia Grabher v Uzcategui, Aymet | 6-1,6-1 |
| ITF Women Orlando Qual | 2018/01/16 18:15 | Katie Swan v Uzcategui, Aymet | 6-7,3-6 |
| ITF Women Orlando Qual | 2018/01/15 15:00 | Uzcategui, Aymet v Madison Bourguignon | 6-3,6-3 |
| ITF Women Orlando Qual | 2018/01/14 15:00 | Testa, Giorgia v Uzcategui, Aymet | 0-6,1-6 |