| ITF W25 Malibu | 11/04 17:00 | 54 | Lorraine M. Guillermo v Alexa Noel | 7-5,6-3 | |
| ITF W80 Tyler | 11/01 16:00 | 26 | Lorraine M. Guillermo v Jamie Loeb | 3-6,4-6 | |
| ITF W80 Tyler | 10/31 16:55 | 25 | Jaimee Fourlis v Lorraine M. Guillermo | 0-6,5-7 | |
| ITF W80 Tyler | 10/29 15:30 | 54 | Lorraine M. Guillermo v Paige Hourigan | 6-1,6-2 | |
| ITF W80 Tyler | 10/28 15:00 | 54 | Sophie Chang v Lorraine M. Guillermo | 4-6,5-7 | |
| ITF W25 Dallas | 10/24 15:00 | 26 | Lorraine M. Guillermo v Olivia Tjandramulia | 4-6,6-7 | |
| ITF W25 Dallas | 10/23 17:20 | 25 | Lorraine M. Guillermo v Emily Appleton | 6-3,6-1 | |
| ITF W25 Dallas | 10/22 15:00 | 54 | Lorraine M. Guillermo v Hind Abdelouahid | 6-1,6-0 | |
| ITF W25 Waco | 10/18 17:55 | 27 | Lorraine M. Guillermo v Fernanda Contreras Gomez | 2-6,3-6 | |
| ITF W25 Waco | 10/17 17:55 | 26 | Lorraine M. Guillermo v Melany Solange Krywoj | 6-3,6-4 | |
| ITF W25 Waco | 10/16 18:20 | 25 | Jodie Anna Burrage v Lorraine M. Guillermo | 0-6,4-6 | |
| ITF W15 Norman | 10/04 16:20 | 27 | Lorraine M. Guillermo v Dalayna Hewitt | 6-4,2-6,4-6 | |
| ITF W15 Norman | 10/03 15:00 | 26 | Lorraine M. Guillermo v Charlotte Chavatipon | 6-3,6-7,6-4 | |
| ITF W15 Norman | 10/01 15:00 | 25 | Lorraine M. Guillermo v Lisa-Marie Rioux | 6-4,7-5 | |
| ITF W60 Templeton | 09/24 17:20 | 54 | Pamela Montez v Lorraine M. Guillermo | 6-4,6-2 | |
| ITF W60 Templeton | 09/23 21:15 | 54 | Sarah Lee v Lorraine M. Guillermo | 3-6,3-6 | |
| ITF W25 Redding | 09/10 21:25 | 25 | [500] Lorraine M. Guillermo v Gabriela Talaba [307] | 3-6,6-4,4-6 | |
| ITF W25 Fort Worth | 08/03 17:15 | 28 | Lorraine M. Guillermo v Chanelle Van Nguyen | 6-4,5-7,3-6 | |
| ITF W25 Fort Worth | 08/02 14:00 | 27 | Lorraine M. Guillermo v Sophia Whittle | 6-0,7-6 | |
| ITF W25 Fort Worth | 08/01 14:00 | 26 | Lorraine M. Guillermo v Amy Zhu | 6-4,6-3 | |
| ITF W25 Fort Worth | 07/31 16:55 | 25 | [340] Gabriela Talaba v Lorraine M. Guillermo [464] | 3-6,6-1,4-6 | |
| ITF W60 Ashland | 07/24 16:25 | 25 | [459] Lorraine M. Guillermo v Maegan Manasse [338] | 3-6,1-6 | |
| ITF W60 Ashland | 07/23 14:50 | 54 | [498] Alycia Parks v Lorraine M. Guillermo [459] | 4-6,2-6 | |
| ITF W60 Ashland | 07/22 15:20 | 54 | Jasmine Boyd v Lorraine M. Guillermo | 1-6,0-6 | |
| ITF W60 Berkeley | 07/15 22:35 | 54 | [456] Lorraine M. Guillermo v Hayley Carter [445] | 4-6,6-2,4-10 | |
| ITF W60 Honolulu | 07/09 00:40 | 54 | Tori Kinard v Lorraine M. Guillermo | 2-6,6-0,10-8 | |
| ITF W25 Denver | 06/19 16:00 | 25 | [459] Lorraine M. Guillermo v Chieh-Yu Hsu [432] | 4-6,4-6 | |
| ITF W25 Nonthaburi | 05/28 05:30 | 54 | Lorraine M. Guillermo v Chompoothip Jundakate | 4-6,5-7 | |
| ITF W25 Nonthaburi | 05/27 04:30 | 54 | Lorraine M. Guillermo v Apichaya Runglerdkriangkrai | 6-0,6-1 | |
| ITF W25 Nonthaburi | 05/21 07:45 | 25 | Peangtarn Plipuech v Lorraine M. Guillermo | 7-6,4-6,6-3 |