| US Pro Tennis Series West Coast Women | 2020/06/08 16:00 | Maegan Manasse v Guillermo, Lorraine M | 3-6,6-7 |
| Ashland, Simples W-ITF-USA-23A | 2019/07/24 16:25 | Guillermo, Lorraine M v Maegan Manasse | 3-6,1-6 |
| ITF Women Ashland Qual | 2018/07/23 16:10 | Maegan Manasse v Guillermo, Lorraine M | 6-4,6-0 |
| ITF Women Berkeley | 2018/07/18 19:00 | Guillermo, Lorraine M v Maegan Manasse | 4-6,2-6 |
| UTR Pro Tennis Series California Women | 2020/08/07 18:30 | Davis, Emma v Guillermo, Lorraine M | 7-5,6-1 |
| UTR Pro Tennis Series California Women | 2020/08/07 16:00 | Marcela Zacarias v Guillermo, Lorraine M | 1-6,6-0,1-0 |
| UTR Pro Tennis Series California Women | 2020/08/01 18:30 | Guillermo, Lorraine M v Charlotte Chavatipon | 6-1,6-2 |
| UTR Pro Tennis Series California Women | 2020/08/01 16:00 | Guillermo, Lorraine M v Giuliana Olmos | 3-6,3-6 |
| UTR Pro Tennis Series California Women | 2020/07/29 18:30 | Guillermo, Lorraine M v Sherif, Jwany | 6-4,6-7,6-10 |
| UTR Pro Tennis Series California Women | 2020/07/29 17:15 | Hanna Chang v Guillermo, Lorraine M | 3-6,6-2,10-6 |
| UTR Pro Tennis Series California Women | 2020/07/28 18:30 | Guillermo, Lorraine M v Charlotte Chavatipon | 3-6,4-6 |
| UTR Pro Tennis Series California Women | 2020/07/28 16:00 | Guillermo, Lorraine M v Hance, Kimmi | 7-5,3-6,10-6 |
| UTR Pro Tennis Series California Women | 2020/08/06 16:00 | Marcela Zacarias v Maegan Manasse | 6-2,6-3 |
| UTR Pro Tennis Series California Women | 2020/08/05 17:15 | Sophie Chang v Maegan Manasse | 4-6,6-7 |
| UTR Pro Tennis Series California Women | 2020/08/04 16:00 | Morgina, Anna v Maegan Manasse | 0-6,0-6 |
| UTR Pro Tennis Series California Women | 2020/08/02 16:00 | Charlotte Chavatipon v Maegan Manasse | 2-6,0-6 |
| UTR Pro Tennis Series California Women | 2020/07/30 17:15 | Morgina, Anna v Maegan Manasse | 2-6,2-6 |
| UTR Pro Tennis Series California Women | 2020/07/29 16:00 | Closs, Mary v Maegan Manasse | 0-6,2-6 |
| UTR Pro Tennis Series California Women | 2020/07/21 16:00 | Closs, Mary v Maegan Manasse | 1-6,2-6 |
| UTR Pro Tennis Series California Women | 2020/07/19 18:30 | Montez, Pamela v Maegan Manasse | 4-6,3-6 |