Stadium: Court 2 Round: 62
| ITF Women Rancho Santa Fe Qual | 2018/02/19 17:30 | Caroline Werner v Guillermo, Lorraine M | 3-6,2-6 |
| Surprise, Singles Qualifying W-WITF-USA-05A | 2018/02/11 20:00 | Guillermo, Lorraine M v Marine Partaud | 4-6,5-7 |
| Wesley Chapel, Singles Qualifying W-WITF-USA-03A | 2018/01/21 14:30 | Reka-Luca Jani v Guillermo, Lorraine M | 5-7,6-2,6-2 |
| ITF Women Orlando Qual | 2018/01/14 15:00 | Guillermo, Lorraine M v Dasha Ivanova | 4-6,6-2,4-6 |
| Daytona Beach, Singles Qualifying W-WITF-USA-01A | 2018/01/07 15:00 | Pierson, Rachel May v Guillermo, Lorraine M | 6-4,7-5 |
| ITF Women Norman Qual | 2017/11/14 16:00 | Pierson, Rachel May v Guillermo, Lorraine M | 6-2,6-4 |
| ITF Women Norman Qual | 2017/11/13 17:00 | Lisa-Marie Rioux v Guillermo, Lorraine M | 2-6,1-6 |
| ITF Women Norman Qual | 2017/11/12 17:00 | Iyengar, Sumvruta v Guillermo, Lorraine M | 2-6,0-6 |
| ITF Women Rancho Santa Fe Qual | 2018/02/19 19:00 | Anna Turati v Larcher de Brito, Michele | 6-7,4-6 |
| ITF Women Rancho Santa Fe Qual | 2018/02/18 22:00 | Nina Ugrelidze v Larcher de Brito, Michele | 2-6,2-6 |
| Surprise, Singles Qualifying W-WITF-USA-05A | 2018/02/13 20:35 | Larcher de Brito, Michele v Marine Partaud | 4-6,4-6 |
| Surprise, Singles Qualifying W-WITF-USA-05A | 2018/02/12 17:00 | Larcher de Brito, Michele v Anna Ustinoff | 6-2,6-4 |
| ITF Women Midland Qual | 2018/01/28 20:25 | Larcher de Brito, Michele v Usue Maitane Arconada | 5-7,6-4,4-6 |
| ITF Women Gatineau | 2017/07/17 15:25 | Perez, Ellen v Larcher de Brito, Michele | 6-3,6-4 |
| ITF Women Winnipeg | 2017/07/10 15:00 | Larcher de Brito, Michele v Imanishi, Miharu | 3-6,4-6 |
| Wimbledon Women Qual | 2017/06/29 10:00 | Larcher de Brito, Michele v Kulichkova, Elizaveta | 3-6,6-4,1-6 |