Stadium: Centre Court Round: 25 Ground: Hardcourt outdoor
| Hua Hin, Singles W-WITF-THA-07A | 2018/05/02 02:30 | Guillermo, Lorraine M v Ma, Shuyue | 6-7,2-6 |
| Hua Hin, Singles W-WITF-THA-07A | 2018/05/01 02:30 | Guillermo, Lorraine M v Amy Zhu | 6-3,6-3 |
| ITF Women Dothan Qual | 2018/04/15 18:00 | Guillermo, Lorraine M v Gleason, Quinn | 6-3,6-7,2-6 |
| ITF Women Pelham | 2018/04/10 17:15 | Guillermo, Lorraine M v Hendler, Tamaryn | 5-7,4-6 |
| ITF Women Rancho Santa Fe | 2018/02/22 20:40 | Guillermo, Lorraine M v Ann Li | 6-7,3-6 |
| ITF Women Rancho Santa Fe | 2018/02/21 22:50 | Kayla Day v Guillermo, Lorraine M | 3-6,6-7 |
| ITF Women Rancho Santa Fe Qual | 2018/02/20 18:00 | Guillermo, Lorraine M v Larcher de Brito, Michele | 6-2,6-4 |
| ITF Women Rancho Santa Fe Qual | 2018/02/19 17:30 | Caroline Werner v Guillermo, Lorraine M | 3-6,2-6 |
| Hua Hin, Singles W-WITF-THA-07A | 2018/05/01 02:30 | Zhibek Kulambayeva v Walters, Alexandra | 6-3,6-3 |
| Cairo, Singles W-WITF-EGY-02A | 2018/04/24 08:00 | Irina Fetecau v Walters, Alexandra | 6-0,6-0 |
| Sharm El Sheikh, Singles W-WITF-EGY-09A | 2018/04/18 08:00 | Dasha Ivanova v Walters, Alexandra | 6-3,3-6,6-1 |
| Sharm El Sheikh, Singles W-WITF-EGY-09A | 2018/04/09 08:00 | Walters, Alexandra v Kitagawa, Rio | 3-6,2-6 |
| Sharm El Sheikh, Singles W-WITF-EGY-09A | 2018/04/08 08:00 | Walters, Alexandra v Wu, Fang-Hsien | 6-4,0-6,6-3 |
| ITF Women Canberra Qual | 2018/03/25 23:00 | Walters, Alexandra v Mataruga, Ramona | 4-6,2-6 |
| ITF Women Canberra Qual | 2018/03/24 23:00 | Walters, Alexandra v Simes, Ashleigh | 6-0,6-4 |
| ITF Women Canberra Qual | 2018/03/16 23:00 | Walters, Alexandra v Poulos, Annerly | 1-6,2-6 |