Stadium: Stadium Round: 25 Ground: Hardcourt outdoor
| Irapuato, Singles Qualifying W-WITF-MEX-01A | 2018/03/11 20:30 | Riley, Alexandra v Douglas, Ellie | 3-6,4-6 |
| Irapuato, Singles Qualifying W-WITF-MEX-01A | 2018/03/10 20:30 | Duva, Andrea v Douglas, Ellie | 0-6,3-6 |
| ITF Women Rancho Santa Fe Qual | 2018/02/19 19:00 | Claire Liu v Douglas, Ellie | 6-2,6-0 |
| Surprise, Singles Qualifying W-WITF-USA-05A | 2018/02/11 17:00 | Douglas, Ellie v Goncalves, Paula Cristina | 0-6,2-6 |
| ITF Women Waco Qual | 2017/11/05 16:00 | Lysa, Yuliya v Douglas, Ellie | 4-6,6-3,7-6 |
| ITF Women Tyler Qual | 2017/10/30 17:50 | Douglas, Ellie v Ksenia Laskutova | 6-2,3-6,2-6 |
| ITF Women Tyler Qual | 2017/10/29 16:50 | Douglas, Ellie v Janssen, Rachel | 6-2,6-2 |
| ITF Women Fort Worth | 2017/08/02 21:35 | Jessica Failla v Douglas, Ellie | 2-6,6-3,6-3 |
| Campinas, Singles W-WITF-BRA-03A | 2018/03/07 14:00 | Chieh-Yu Hsu v Schaefer, Dominique | 1-6,3-6 |
| ITF Women Sao Paulo | 2018/02/27 13:00 | Andrea Gamiz v Chieh-Yu Hsu | 6-2,6-1 |
| Curitiba, Singles W-WITF-BRA-01A | 2018/02/21 14:30 | Marcela Zacarias v Chieh-Yu Hsu | 6-1,6-3 |
| ITF Women Hammamet | 2018/02/17 09:00 | Chieh-Yu Hsu v Rosca, Andreea Amalia | 2-6,1-6 |
| ITF Women Hammamet | 2018/02/16 09:30 | Chieh-Yu Hsu v Simic, Jelena | 7-6,6-3 |
| ITF Women Hammamet | 2018/02/15 09:30 | Chieh-Yu Hsu v Fiona Codino | 6-1,6-0 |
| ITF Women Hammamet | 2018/02/14 08:30 | Chieh-Yu Hsu v Nanti, Mariagiovanna | 6-0,6-2 |
| Fed Cup, Groupe Mondial | 2018/02/10 06:15 | Ankita Raina v Chieh-Yu Hsu | 6-4,5-7,6-1 |