Stadium: Court 5 Round: 62 Ground: Clay
| ITF W15 Sibenik | 2021/05/17 09:25 | Rittberger, Sabrina v Victoria Borodulina | 6-3,5-7,4-10 |
| ITF W15 Sibenik | 2021/05/16 07:30 | Lacasse, Raphaelle v Rittberger, Sabrina | 4-6,7-5,4-10 |
| UTR Pro Tennis Series Barcelona Women | 2021/02/13 12:00 | Rittberger, Sabrina v Alice Tubello | 2-6,2-6 |
| UTR Pro Tennis Series Barcelona Women | 2021/02/12 12:30 | Suvrijn, Jade v Rittberger, Sabrina | 6-0,1-6,6-3 |
| UTR Pro Tennis Series Barcelona Women | 2021/02/11 09:00 | Irina Maria Bara v Rittberger, Sabrina | 6-4,6-1 |
| UTR Pro Tennis Series Barcelona Women | 2021/02/09 09:30 | Atucha Gomez, Ainhoa v Rittberger, Sabrina | 6-2,3-4 |
| UTR Pro Tennis Series Barcelona Women | 2021/02/08 10:30 | Rittberger, Sabrina v Burguete Beltran, Andrea | 6-1,6-4 |
| ITF - W15 Antalya | 2020/12/06 07:00 | Rittberger, Sabrina v Milenkovic, Kristina | 4-6,0-6 |
| ITF W15 Sibenik | 2021/05/23 08:00 | Katerina Mandelikova v Lisa-Marie Rioux | 2-6,1-6 |
| ITF - W15 Sharm El Sheikh | 2021/02/22 10:30 | Amarni Banks v Lisa-Marie Rioux | 6-1,6-2 |
| ITF - W15 Sharm El Sheikh | 2021/02/21 11:30 | Denise Hrdinkova v Lisa-Marie Rioux | 6-3,6-0 |
| ITF - W15 Sharm El Sheikh | 2021/02/15 10:30 | Lisa-Marie Rioux v Elena-Teodora Cadar | 5-7,1-6 |
| ITF - W15 Sharm El Sheikh | 2021/02/14 14:30 | Marie Mettraux v Lisa-Marie Rioux | 3-6,2-6 |
| ITF - W15 Sharm El Sheikh | 2021/02/09 07:30 | Lisa-Marie Rioux v Davis, Emma | 4-6,7-5,2-10 |
| ITF - W15 Sharm El Sheikh | 2021/02/08 09:30 | Zawadzka, Joanna v Lisa-Marie Rioux | 5-7,5-7 |
| ITF - W15 Sharm El Sheikh | 2021/02/07 08:00 | Anna Brogan v Lisa-Marie Rioux | 2-6,1-6 |