Stadium: Estadio 4 Round: 2
| WTA Montevideo | 2021/11/16 20:15 | Guillermina Grant v Maria Lourdes Carle | 6-7,2-6 |
| Billie Jean King Cup | 2021/06/26 19:00 | Charlotte Roemer v Guillermina Grant | 7-5,3-6,6-3 |
| Billie Jean King Cup | 2021/06/25 15:00 | Sydney-Nicole Clarke v Guillermina Grant | 2-6,3-6 |
| Billie Jean King Cup | 2021/06/24 17:10 | Guillermina Grant v Ariana Rahmanparast | 6-3,6-2 |
| 2019 Fed Cup | 2019/04/19 14:00 | Melissa Morales v Guillermina Grant | 7-5,5-7,6-4 |
| 2019 Fed Cup | 2019/04/18 14:00 | Isid Hernandez v Guillermina Grant | 4-6,1-6 |
| 2019 Fed Cup | 2019/04/17 14:00 | Ana Julissa De Mata v Guillermina Grant | 6-4,1-6,2-6 |
| 2019 Fed Cup | 2019/04/16 14:00 | Aymet Uzcategui v Guillermina Grant | 4-6,6-1,6-4 |
| Billie Jean King Cup | 2021/10/28 16:10 | Paola Bou v Hannah Chambers | 6-4,2-6,6-4 |
| Billie Jean King Cup | 2021/10/27 15:30 | Noelia Zeballos v Hannah Chambers | 6-2,6-1 |
| 2018 Fed Cup | 2018/06/23 17:20 | Florencia Rossi v Hannah Chambers | 6-3,6-0 |
| 2018 Fed Cup | 2018/06/20 15:30 | Francesca Segarelli v Hannah Chambers | 6-2,5-3 |