| ITF Women Jackson Qual | 2018/04/01 19:30 | 콜렌스, 브리타니 v Fisch, Julia | 6-4,3-6,6-3 |
| Sharm El Sheikh, Singles W-WITF-EGY-09A | 2018/02/10 08:00 | 콜렌스, 브리타니 v 포플라브스카, 아나스타시야 | 2-6,2-6 |
| Sharm El Sheikh, Singles W-WITF-EGY-09A | 2018/02/06 08:00 | 콜렌스, 브리타니 v Cernecka, Alise | 3-6,3-6 |
| Sharm El Sheikh, Singles W-WITF-EGY-09A | 2018/01/28 10:30 | 콜렌스, 브리타니 v 성, 위치 | 1-6,3-6 |
| Sharm El Sheikh, Singles W-WITF-EGY-09A | 2018/01/20 09:00 | 룬글러드크리앙크라이, 아피차야 v 콜렌스, 브리타니 | 6-2,6-1 |
| Sharm El Sheikh, Singles W-WITF-EGY-09A | 2018/01/14 08:00 | 콜렌스, 브리타니 v Li, Jiakang | 1-6,6-7 |
| Sharm El Sheikh, Singles W-WITF-EGY-09A | 2017/11/11 14:00 | 치고우로바, 카테리나 v 콜렌스, 브리타니 | 6-2,6-4 |
| Sharm El Sheikh, Singles W-WITF-EGY-09A | 2017/11/05 17:00 | 사와트디, 와트사콜 v 콜렌스, 브리타니 | 6-7,6-1,6-4 |
| ITF Women Jackson Qual | 2018/04/01 19:30 | Okuda, Akiko v Marker, Lauren | 5-7,2-6 |
| Tel Aviv-Ramat Gan, Singles W-C10-ISR-08A | 2018/03/22 11:30 | 코벨트, 마델레인 v Marker, Lauren | 6-2,1-6,6-3 |
| Tel Aviv-Ramat Gan, Singles W-C10-ISR-08A | 2018/03/20 08:00 | Marker, Lauren v 수, 칭 원 | 6-1,6-3 |
| ITF Women Ramat Hasharon | 2018/03/13 08:00 | 스콜센, 헬렌 v Marker, Lauren | 6-3,6-3 |
| Indian Wells, USA, Qualifying | 2018/02/24 18:00 | 브로아디, 나오미 v Marker, Lauren | 6-3,6-3 |
| ITF Women Rancho Santa Fe Qual | 2018/02/19 17:30 | Marker, Lauren v 닐, 인그리드 | 3-6,3-6 |
| ITF Women Rancho Santa Fe Qual | 2018/02/18 17:30 | Jovic, J. v Marker, Lauren | 6-7,2-6 |
| ITF Women Surprise | 2018/02/14 17:00 | Marker, Lauren v 산체즈, 아나 소피아 | 7-6,3-6,2-6 |