Stadium: Court 4 Round: 25 Ground: Clay
| ITF Women Sao Paulo | 2018/03/01 14:00 | Katerina Stewart v Barbara Haas | 6-1,2-6,1-6 |
| ITF Women Sao Paulo | 2018/02/27 13:00 | Carolina Alves v Katerina Stewart | 5-7,1-6 |
| ITF Women Sao Paulo Qual | 2018/02/26 14:40 | Katerina Stewart v Eduarda Piai | 6-0,6-3 |
| ITF Women Sao Paulo Qual | 2018/02/25 16:00 | Katerina Stewart v Carla Lucero | 6-2,6-0 |
| ITF Women Sao Paulo Qual | 2018/02/24 15:30 | Katerina Stewart v Julieta Lara Estable | 7-5,6-2 |
| ITF Women Wesley Chapel | 2018/01/24 16:35 | Katerina Stewart v Whitney Osuigwe | 3-6,5-7 |
| ITF Women Orlando Qual | 2018/01/15 15:00 | Katerina Stewart v Chihiro Muramatsu | 3-6,6-7 |
| ITF Women Orlando Qual | 2018/01/14 15:00 | Katerina Stewart v Catherine Leduc | 6-2,6-1 |
| ITF Women Rancho Santa Fe Qual | 2018/02/19 19:00 | Robin Anderson v Ilona Kremen | 6-3,6-0 |
| ITF Women Rancho Santa Fe Qual | 2018/02/18 22:00 | Alexis Thoma v Ilona Kremen | 0-6,0-6 |
| ITF Women Surprise Qual | 2018/02/11 17:00 | Ashley Weinhold v Ilona Kremen | 6-4,6-3 |
| ITF Women Wesley Chapel Qual | 2018/01/21 16:30 | Marcela Zacarias v Ilona Kremen | 6-1,6-1 |
| ITF Women Orlando Qual | 2018/01/15 15:00 | Reka-Luca Jani v Ilona Kremen | 6-0,6-4 |
| ITF Women Orlando Qual | 2018/01/14 21:00 | Ilona Kremen v Julia Lohoff | 6-2,6-3 |
| ITF Women Daytona Beach Qual | 2018/01/07 16:30 | Ilona Kremen v Hanna Chang | 6-7,6-7 |
| ITF Women Obidos | 2017/10/18 15:00 | Ilona Kremen v Dalila Spiteri | 3-6,3-6 |