Stadium: Court 5 Round: 25 Ground: Clay
| ITF - Manacor W15 | 2021/01/31 12:00 | Valentina Ryser v Marine Szostak | 4-6,6-4,10-8 |
| ITF - Dijon W15 | 2021/09/13 10:00 | Marine Szostak v Veronika Podrez | 6-3,6-4 |
| ITF - Saint Palais Sur Mer W25 | 2021/09/06 11:20 | Emeline Dartron v Marine Szostak | 6-3,3-6,15-13 |
| ITF - Saint Palais Sur Mer W25 | 2021/09/05 13:00 | Luisina Giovannini v Marine Szostak | 2-6,1-6 |
| ITF - Aix-en-Provence W15 | 2021/09/02 13:55 | Marine Szostak v Margaux Rouvroy | 3-6,2-6 |
| ITF - Aix-en-Provence W15 | 2021/09/01 11:55 | Marine Szostak v Cosima T Calinescu | 6-2,6-3 |
| ITF - Aix-en-Provence W15 | 2021/08/31 07:55 | Marine Szostak v Zoe Bourbotte | 6-1,6-2 |
| ITF - Les Contamines W25 | 2021/07/20 10:35 | Naiktha Bains v Marine Szostak | 6-4,7-5 |
| ITF - Montpellier W60 | 2021/06/27 14:25 | Marine Szostak v Sada Nahimana | 2-6,4-6 |
| ITF - Montreux W60 | 2021/09/08 10:35 | Conny Perrin v Valentina Ryser | 6-1,7-6 |
| ITF - Collonge-Bellerive W60 | 2021/09/01 09:35 | Oceane Dodin v Valentina Ryser | 6-3,7-5 |
| ITF - Verbier W25 | 2021/08/25 14:20 | Maria Timofeeva v Valentina Ryser | 4-6,6-3,6-3 |
| ITF - Savitaipale W15 | 2021/07/31 09:00 | Valentina Ryser v Emily Seibold | 6-3,4-6,6-7 |
| ITF - Savitaipale W15 | 2021/07/30 09:00 | Valentina Ryser v Maria Lota Kaul | 6-2,6-4 |
| ITF - Savitaipale W15 | 2021/07/29 07:00 | Valentina Ryser v Kajsa Rinaldo Persson | 6-4,6-2 |
| ITF - Savitaipale W15 | 2021/07/28 13:15 | Valentina Ryser v Daria Shalamanova | 1-6,6-1,6-2 |
| ITF - Monastir W15 | 2021/07/10 08:30 | Angelica Raggi v Valentina Ryser | 6-4,5-7,6-3 |