Stadium: Court 4 Round: 27 Ground: Hardcourt outdoor
| ITF W15 Sharm El Sheikh | 2021/10/07 08:00 | Jiaqi Wang v Tamara Kostic | 7-6,2-6,3-6 |
| ITF W15 Sharm El Sheikh | 2021/10/05 08:00 | Tamara Kostic v Kira Pavlova | 6-2,0-6,6-2 |
| ITF W15 Sharm El Sheikh | 2021/10/04 08:00 | Tamara Kostic v Amelie-C Janssen | 7-6,6-2 |
| ITF W25 Vienna | 2021/08/31 17:15 | Maria F Herazo Gonzalez v Tamara Kostic | 6-3,4-6,6-1 |
| ITF W15 Bad Waltersdorf | 2021/08/25 12:05 | Tamara Kostic v Katarina Kuzmova | 5-7,4-6 |
| ITF W15 Don Benito | 2021/07/21 07:00 | Tamara Kostic v Olga Parres Azcoitia | 7-5,0-6,4-6 |
| ITF W15 Don Benito | 2021/07/20 11:05 | Tamara Kostic v Claudia Martinez de Velasco | 6-2,6-3 |
| ITF W15 Don Benito | 2021/07/19 15:00 | Marina Benito v Tamara Kostic | 3-6,3-6 |
| ITF W15 Sharm El Sheikh | 2021/10/07 08:00 | Lena Ruppert v Punnin Kovapitukted | 7-5,6-4 |
| ITF W15 Sharm El Sheikh | 2021/10/06 13:40 | Ashmitha Easwaramurthi v Lena Ruppert | 1-6,0-6 |
| ITF W15 Wanfercee-Baulet | 2021/08/23 10:40 | Lena Ruppert v Chloe Noel | 3-6,4-6 |
| ITF W15 Erwitte | 2021/08/16 09:00 | Lena Ruppert v Paula Rumpf | 4-6,7-5,7-10 |
| ITF W15 Frederiksberg | 2021/08/07 09:00 | Lena Ruppert v Nicole Khirin | 7-5,4-6,4-6 |
| ITF W15 Frederiksberg | 2021/08/06 08:50 | Sofia Nami Samavati v Lena Ruppert | 3-6,6-3,4-6 |
| ITF W15 Frederiksberg | 2021/08/05 07:55 | Lena Ruppert v Laetitia Pulchartova | 6-3,6-7,7-6 |
| ITF W15 Frederiksberg | 2021/08/03 12:50 | Emily Welker v Lena Ruppert | 0-6,3-6 |