Stadium: Court 1 Round: 1
| Irapuato, Singles W-ITF-MEX-02A | 2020/03/11 02:00 | Maria Camila Osorio Serrano v Andrea Gamiz | 7-5,1-6,7-6 |
| Irapuato, Singles W-ITF-MEX-02A | 2020/03/09 17:00 | Andrea Gamiz v Martinez Mora, Ana Paula | 6-1,7-5 |
| ITF W15 Cancun | 2020/02/23 14:30 | Andrea Gamiz v Carolina Alves | 6-7,7-5,6-0 |
| ITF W15 Cancun | 2020/02/22 14:30 | Thaisa Grana Pedretti v Andrea Gamiz | 5-7,5-7 |
| ITF W15 Cancun | 2020/02/20 14:00 | Andrea Gamiz v Maria Paulina Perez Garcia | 6-2,6-0 |
| ITF W15 Cancun | 2020/02/19 16:55 | Andrea Gamiz v Tilbuerger, Jantje | 6-1,6-1 |
| ITF W15 Cancun | 2020/02/13 14:00 | Andrea Gamiz v Ong, Vanessa | 6-7,5-7 |
| ITF W15 Cancun | 2020/02/12 14:00 | Andrea Gamiz v Ingrid Gamarra Martins | 6-3,6-4 |
| US Pro Tennis Series West Coast Women | 2020/06/08 16:00 | Maegan Manasse v Guillermo, Lorraine M | 3-6,6-7 |
| US Pro Tennis Series West Coast Women | 2020/06/06 19:50 | Whittle, Sophia v Guillermo, Lorraine M | 6-2,6-2 |
| US Pro Tennis Series West Coast Women | 2020/06/06 16:00 | Mohamad, Shatoo v Guillermo, Lorraine M | 5-7,2-6 |
| US Pro Tennis Series West Coast Women | 2020/06/05 19:55 | Giuliana Olmos v Guillermo, Lorraine M | 7-6,6-7,10-5 |
| US Pro Tennis Series West Coast Women | 2020/06/05 18:05 | Hanna Chang v Guillermo, Lorraine M | 6-0,6-4 |
| US Pro Tennis Series West Coast Women | 2020/06/02 20:20 | Montez, Pamela v Guillermo, Lorraine M | 6-1,6-3 |
| US Pro Tennis Series West Coast Women | 2020/06/02 17:55 | Guillermo, Lorraine M v Ena Shibahara | 7-5,4-6,5-10 |
| Las Vegas, Singles W-ITF-USA-08A | 2020/03/02 18:00 | Charlotte Chavatipon v Guillermo, Lorraine M | 0-6,6-3,10-4 |