Stadium: Court 5 Round: 54
| ITF Women Berkeley Qual | 2018/07/15 23:40 | Boren, Brynn v Mossmer, Nicole | 3-6,2-6 |
| ITF Women Honolulu Qual | 2018/07/08 22:05 | Mossmer, Nicole v Ena Shibahara | 3-6,4-6 |
| ITF Women Victoria | 2018/06/17 16:30 | Mossmer, Nicole v Rizzolo, Kayla | 4-6,3-6 |
| ITF Women Sumter | 2018/06/13 15:55 | Mossmer, Nicole v Chieh-Yu Hsu | 3-6,0-6 |
| Sumter, Singles Qualifying W-WITF-USA-18A | 2018/06/12 13:00 | Mossmer, Nicole v Hourigan, Paige Mary | 6-4,6-3 |
| Sumter, Singles Qualifying W-WITF-USA-18A | 2018/06/11 13:00 | Mossmer, Nicole v Guerin, Kimberly | 6-2,6-4 |
| Sumter, Singles Qualifying W-WITF-USA-18A | 2018/06/10 13:00 | Amy Zhu v Mossmer, Nicole | 5-7,3-6 |
| ITF Women Stillwater | 2017/09/28 19:10 | Mossmer, Nicole v Usue Maitane Arconada | 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 Victoria | 2018/06/22 18:55 | Montez, Pamela v Guillermo, Lorraine M | 6-4,6-1 |
| ITF Women Victoria | 2018/06/20 19:05 | Arseneault, Ariana v Guillermo, Lorraine M | 1-6,2-6 |
| ITF Women Victoria | 2018/06/18 19:50 | Haley Giavara v Guillermo, Lorraine M | 5-7,2-6 |
| ITF Women Hua Hin Qual | 2018/06/03 03:00 | Guillermo, Lorraine M v Montez, Pamela | 4-6,2-6 |
| Hua Hin, Singles W-WITF-THA-07A | 2018/05/29 06:45 | Monica Robinson v Guillermo, Lorraine M | 6-3,7-6 |