Stadium: V3 Round: 28 Ground: Hardcourt outdoor
| ITF W25 Fort Worth | 2019/08/02 14:00 | Guillermo, Lorraine M v Whittle, Sophia | 6-0,7-6 |
| ITF W25 Fort Worth | 2019/08/01 14:00 | Guillermo, Lorraine M v Amy Zhu | 6-4,6-3 |
| ITF W25 Fort Worth | 2019/07/31 16:55 | Talaba, Gabriela v Guillermo, Lorraine M | 3-6,6-1,4-6 |
| Ashland, Simples W-ITF-USA-23A | 2019/07/24 16:25 | Guillermo, Lorraine M v Maegan Manasse | 3-6,1-6 |
| Ashland, Simples W-ITF-USA-23A | 2019/07/23 14:50 | Alycia Parks v Guillermo, Lorraine M | 4-6,2-6 |
| Ashland, Simples W-ITF-USA-23A | 2019/07/22 15:20 | Boyd, Jasmine v Guillermo, Lorraine M | 1-6,0-6 |
| ITF W60 Berkeley | 2019/07/15 22:35 | Guillermo, Lorraine M v Carter, Hayley | 4-6,6-2,4-10 |
| Honolulu, Simples W-ITF-USA-20A | 2019/07/09 00:40 | Kinard, Tori v Guillermo, Lorraine M | 2-6,6-0,10-8 |
| ITF W25 Fort Worth | 2019/08/02 14:00 | van Nguyen, Chanelle v Lauren Proctor | 6-3,6-1 |
| ITF W25 Fort Worth | 2019/08/01 15:20 | van Nguyen, Chanelle v Jones, Makenna | 6-3,7-6 |
| ITF W25 Fort Worth | 2019/07/31 23:25 | van Nguyen, Chanelle v Westby, Madison | 6-4,6-3 |
| ITF W25 Fort Worth | 2019/07/30 14:00 | van Nguyen, Chanelle v Lauren Proctor | 3-6,6-7 |
| ITF W25 Fort Worth | 2019/07/29 14:00 | van Nguyen, Chanelle v Hart, Jada Myii | 3-6,7-5,10-6 |
| ITF W25 Evansville | 2019/07/22 18:00 | van Nguyen, Chanelle v Hart, Jada Myii | 7-6,6-7,2-10 |
| ITF W60 Berkeley | 2019/07/15 19:00 | Ma, Connie v van Nguyen, Chanelle | 6-2,6-0 |
| Honolulu, Simples W-ITF-USA-20A | 2019/07/08 20:00 | Simmonds, Chanel v van Nguyen, Chanelle | 6-2,6-2 |