Stadium: Court 1 Round: 26 Ground: Clay
| ITF W60 Rome, GA | 2021/01/28 00:10 | Irene Burillo Escorihuela v Katharina Gerlach | 3-6,6-2,6-1 |
| ITF W25 Otočec | 2021/06/04 09:25 | Iva Primorac v Katharina Gerlach | 6-4,6-4 |
| ITF W25 Otočec | 2021/06/03 09:55 | Raluca Georgiana Serban v Katharina Gerlach | 2-6,3-6 |
| ITF W25 Otočec | 2021/06/02 13:35 | Marie Benoit v Katharina Gerlach | 2-6,0-6 |
| ITF W60 Saint-Gaudens | 2021/05/12 07:00 | Anna Bondar v Katharina Gerlach | 6-3,6-3 |
| ITF W60 Saint-Gaudens | 2021/05/11 13:00 | Katharina Gerlach v Vlada Koval | 6-1,6-4 |
| ITF W60 Saint-Gaudens | 2021/05/10 15:30 | Katharina Gerlach v Estelle Cascino | 6-3,6-4 |
| ITF W25 Oeiras | 2021/05/01 09:25 | Katharina Gerlach v Maria G Carrasco | 3-6,3-6 |
| ITF W25 Oeiras | 2021/04/30 13:20 | Malene Helgo v Katharina Gerlach | 2-6,4-6 |
| ITF W60 Staré Splavy | 2021/06/16 08:00 | Dominika Salkova v Irene Burillo Escorihuela | 4-6,7-6,3-6 |
| ITF W60 Staré Splavy | 2021/06/15 08:00 | Irene Burillo Escorihuela v Anastasia Zarycka | 6-3,6-1 |
| ITF W60 Staré Splavy | 2021/06/14 09:35 | Irene Burillo Escorihuela v Karolina Kubanova | 4-6,6-3,10-3 |
| ITF W25 Grado | 2021/06/04 15:30 | Irene Burillo Escorihuela v Nuria Brancaccio | 7-5,4-6,1-6 |
| ITF W25 Grado | 2021/06/02 14:10 | Aurora Zantedeschi v Irene Burillo Escorihuela | 6-4,2-6,5-7 |
| ITF W25 Grado | 2021/06/01 11:00 | Tayisiya Morderger v Irene Burillo Escorihuela | 1-6,5-7 |
| ITF W25 Platja D’Aro | 2021/05/23 10:30 | Irene Burillo Escorihuela v Rebeka Masarova | 3-6,6-3,2-6 |
| ITF W25 Platja D’Aro | 2021/05/22 09:00 | Amandine Hesse v Irene Burillo Escorihuela | 6-7,3-6 |