Stadium: Clay 2 Round: 25 Ground: Clay
| ITF W15 Heraklion | 2021/11/04 07:00 | Karen Marthiens v Adriana Rajkovic | 3-6,1-6 |
| ITF W80 Poitiers | 2021/10/26 14:15 | Simona Waltert v Karen Marthiens | 6-0,6-1 |
| ITF W25 Cherbourg | 2021/10/06 08:25 | Karen Marthiens v Himari Sato | 6-3,3-6,0-6 |
| ITF W25 Cherbourg | 2021/10/04 08:30 | Fiona Ganz v Karen Marthiens | 6-2,6-1 |
| ITF W25 Cherbourg | 2021/10/03 10:15 | Mariana Galvao Borges v Karen Marthiens | 0-6,1-6 |
| ITF W15 Dijon | 2021/09/14 11:00 | Karen Marthiens v Anna Klasen | 1-6,1-6 |
| ITF W15 Amarante | 2021/07/20 16:00 | Karen Marthiens v Ayla Aksu | 2-6,3-6 |
| ITF W60 Vitoria-Gasteiz | 2021/07/12 10:00 | Laetitia Pulchartova v Karen Marthiens | 7-5,6-4 |
| ITF W15 Heraklion | 2021/11/09 07:00 | Beatris Spasova v Eleni Christofi | 2-6,0-6 |
| ITF W15 Heraklion | 2021/11/05 07:00 | Eleni Christofi v Anna Gabric | 2-6,1-6 |
| ITF W15 Heraklion | 2021/11/04 06:55 | Adreanna Christopoulou v Eleni Christofi | 0-6,2-6 |
| ITF W15 Heraklion | 2021/11/03 11:50 | Maria Krupenina v Eleni Christofi | 1-6,2-6 |
| ITF W15 Sozopol | 2021/10/14 15:45 | Julia Terziyska v Eleni Christofi | 6-0,6-3 |
| ITF W15 Sozopol | 2021/10/13 13:25 | Daria Zelinskaya v Eleni Christofi | 3-6,3-6 |
| ITF W15 Sozopol | 2021/10/11 12:00 | Eleni Christofi v Defne Cirpanli | 6-1,6-3 |
| ITF W15 Sozopol | 2021/10/10 08:00 | Maria Aldea Wesselly v Eleni Christofi | 0-6,4-6 |