Stadium: Court 1 Round: 25 Ground: Clay
| ITF W25 Kyiv | 2021/07/20 08:00 | Ruppert, Lena v Mariia Bergen | 7-6,6-2 |
| ITF - W15 Antalya | 2021/04/20 07:00 | Ekaterina Shalimova v Ruppert, Lena | 6-3,1-6,10-5 |
| ITF - W15 Antalya | 2021/04/19 07:00 | Aksu, Semra v Ruppert, Lena | 1-6,2-6 |
| ITF - W15 Antalya | 2021/04/18 07:00 | Noka Juric v Ruppert, Lena | 2-6,2-6 |
| ITF - W15 Antalya | 2021/04/12 09:00 | Ruppert, Lena v Polina Bakhmutkina | 6-4,5-7,5-10 |
| ITF - W15 Antalya | 2021/04/11 07:00 | Elena Grekul v Ruppert, Lena | 7-5,3-6,8-10 |
| ITF - W15 Antalya | 2021/03/28 06:30 | Ochsner, Svenja v Ruppert, Lena | 6-3,6-2 |
| ITF - W15 Antalya | 2021/03/24 07:00 | Lucia Cortez Llorca v Ruppert, Lena | 4-6,6-4,14-12 |
| ITF W25 Wroclaw | 2021/06/30 12:10 | Anastasiya Konstantinovna Soboleva v Diana Marcinkevica | 6-4,5-7,3-6 |
| ITF W25 Wroclaw | 2021/06/29 13:20 | Anastasiya Konstantinovna Soboleva v Olyanovskaya, Valeriya | 6-1,6-1 |
| ITF W25 Wroclaw | 2021/06/28 08:00 | Anastasiya Konstantinovna Soboleva v Anna Ozerova | 6-1,6-1 |
| ITF W25 Wroclaw | 2021/06/27 09:30 | Anastasiya Konstantinovna Soboleva v Forys, Weronika Jasmina | 6-2,6-1 |
| ITF - W15 Shymkent | 2021/06/06 04:00 | Anastasiya Konstantinovna Soboleva v Olyanovskaya, Valeriya | 6-4,7-6 |
| ITF - W15 Shymkent | 2021/06/05 05:00 | Dalakishvili, Mariam v Anastasiya Konstantinovna Soboleva | 1-6,2-6 |
| ITF - W15 Shymkent | 2021/06/04 05:00 | Dmitrichenko, Yekaterina v Anastasiya Konstantinovna Soboleva | 4-6,3-6 |
| ITF - W15 Shymkent | 2021/06/03 08:30 | Milana Maslenkova v Anastasiya Konstantinovna Soboleva | 2-6,1-6 |