Stadium: Court V3 Round: 25
| ITF Women Ashland Qual | 2018/07/23 16:10 | Maegan Manasse v Guillermo, Lorraine M | 6-4,6-0 |
| ITF Women Ashland Qual | 2018/07/22 19:55 | Kobelt, Madeleine v Guillermo, Lorraine M | 6-4,2-6,0-6 |
| ITF Women Berkeley | 2018/07/18 19:00 | Guillermo, Lorraine M v Maegan Manasse | 4-6,2-6 |
| ITF Women Berkeley Qual | 2018/07/17 19:00 | Sabrina Santamaria v Guillermo, Lorraine M | 6-2,1-6,6-7 |
| ITF Women Berkeley Qual | 2018/07/16 21:35 | Mossmer, Nicole v Guillermo, Lorraine M | 7-5,3-6,1-6 |
| ITF Women Berkeley Qual | 2018/07/15 23:40 | Gabueva, Angelina v Guillermo, Lorraine M | 6-3,1-6,2-6 |
| ITF Women Winnipeg | 2018/07/12 17:25 | Guillermo, Lorraine M v Erika Sema | 4-6,3-6 |
| ITF Women Winnipeg Qual | 2018/07/08 18:50 | Guillermo, Lorraine M v Jada Bui | 6-3,6-1 |
| ITF Women Baton Rouge | 2018/06/21 14:00 | Black, Hurricane Tyra v Marand, Sanaz | 3-6,2-6 |
| ITF Women Baton Rouge | 2018/06/19 18:50 | Black, Hurricane Tyra v Ena Shibahara | 2-6,6-1,6-2 |
| Naples, Qualifications Simples W-WITF-USA-15A | 2017/05/14 14:30 | Black, Hurricane Tyra v Emiliana Arango | 3-6,0-6 |