Stadium: Court 1 Round: 19 Ground: Clay
| Open d'Australie - Femmes | 2021/01/11 12:55 | Voegele, Stefanie v Gerlach, Katharina | 3-6,4-6 |
| WTA - Stuttgart | 2021/04/17 16:00 | Voegele, Stefanie v Zaja, Anna | 6-1,6-3 |
| WTA - Charleston | 2021/04/13 19:25 | Ons Jabeur v Voegele, Stefanie | 6-4,6-1 |
| WTA - Bogota | 2021/04/09 16:40 | Voegele, Stefanie v Maria Camila Osorio Serrano | 3-6,5-7 |
| WTA - Bogota | 2021/04/07 18:55 | Saisai Zheng v Voegele, Stefanie | 4-6,1-6 |
| WTA - Bogota | 2021/04/05 15:00 | Voegele, Stefanie v Chloe Paquet | 3-6,6-1,6-4 |
| WTA St. Petersburg | 2021/03/16 18:10 | Voegele, Stefanie v Tereza Martincova | 0-6,6-4,4-6 |
| WTA Lyon | 2021/03/04 17:50 | Voegele, Stefanie v Paula Badosa | 2-6,4-6 |
| WTA Lyon | 2021/03/02 12:15 | Voegele, Stefanie v Irina Maria Bara | 7-6,6-7,6-3 |
| WTA - Stuttgart | 2021/04/17 15:55 | Gerlach, Katharina v Laura Ioana Paar | 6-3,7-5 |
| WTA Charleston Qual | 2021/04/10 15:00 | Gerlach, Katharina v Storm Hunter | 3-6,2-6 |
| WTA - Bogota | 2021/04/04 15:00 | Gerlach, Katharina v Daniela Seguel | 1-6,1-6 |
| WTA - Bogota | 2021/04/03 15:00 | Clara Burel v Gerlach, Katharina | 3-6,6-1,4-6 |
| ITF W25 Buenos Aires | 2021/03/26 12:00 | Gerlach, Katharina v Carolina Alves | 4-6,1-6 |
| ITF W25 Buenos Aires | 2021/03/24 16:10 | Gerlach, Katharina v Diana Marcinkevica | 6-0,6-1 |
| ITF W25 Altenkirchen | 2021/02/18 13:10 | Cristina Bucsa v Gerlach, Katharina | 6-1,6-3 |
| ITF W25 Altenkirchen | 2021/02/17 09:30 | Dalma Galfi v Gerlach, Katharina | 6-7,3-6 |