Stadium: Center Court Round: 54 Ground: Clay
| ITF W25 Marbella | 2020/09/01 08:00 | Sebastianna Scilipoti v Karen Marthiens | 7-5,6-1 |
| ITF W25 Marbella | 2020/08/31 08:30 | Karen Marthiens v Alba Rey Garcia | 6-4,7-5 |
| ITF W25 Marbella | 2020/08/30 13:00 | Isabella Nunez v Karen Marthiens | 3-6,0-6 |
| ITF W80 Poitiers | 2019/10/21 12:50 | Margot Yerolymos v Karen Marthiens | 6-2,6-1 |
| ITF W15 Andrezieux-Boutheon | 2019/09/30 08:00 | Karen Marthiens v Longi Noelly Nsimba | 2-6,4-6 |
| ITF W25 Clermont-Ferrand | 2019/09/23 09:15 | Maelys Bougrat v Karen Marthiens | 0-6,6-2,10-8 |
| ITF W25 Vitoria-Gasteiz | 2019/07/25 10:10 | Cristina Bucsa v Karen Marthiens | 6-2,6-0 |
| ITF W25 Vitoria-Gasteiz | 2019/07/24 14:30 | Julieta Lara Estable v Karen Marthiens | 3-6,7-6,1-6 |