Stadium: Center Court Round: 25 Ground: Clay
| ITF Women Shrewsbury | 2018/11/06 14:15 | Katharina Gerlach v Anna Zaja | 4-6,4-6 |
| WTA Nurnberg Qual | 2018/05/19 13:05 | Katharina Gerlach v Anna Zaja | 6-7,3-6 |
| ITF W25 Tunis | 2019/04/11 11:50 | Lara Salden v Katharina Gerlach | 6-2,7-5 |
| ITF W25 Tunis | 2019/04/10 12:00 | Martina Caregaro v Katharina Gerlach | 7-5,1-6,3-6 |
| ITF W25 Canberra | 2019/03/27 04:50 | Leylah Annie Fernandez v Katharina Gerlach | 6-3,3-6,6-4 |
| ITF W25 Canberra | 2019/03/22 01:15 | Katharina Gerlach v Destanee Aiava | 2-6,6-4,1-6 |
| ITF W25 Canberra | 2019/03/21 01:20 | Cagla Buyukakcay v Katharina Gerlach | 6-7,3-6 |
| ITF W25 Canberra | 2019/03/20 02:15 | Katharina Gerlach v Olivia Tjandramulia | 6-3,6-2 |
| ITF W25 Mildura | 2019/03/08 02:20 | Lulu Sun v Katharina Gerlach | 6-2,6-0 |
| ITF W25 Mildura | 2019/03/06 23:00 | Alana Parnaby v Katharina Gerlach | 2-6,6-7 |
| WTA Stuttgart | 2019/04/22 11:00 | Sara Sorribes Tormo v Anna Zaja | 1-6,6-1,7-6 |
| WTA Stuttgart | 2019/04/21 12:40 | Anna Zaja v Bernarda Pera | 6-3,7-5 |
| WTA Stuttgart | 2019/04/20 09:30 | Anna Zaja v Valentini Grammatikopoulou | 7-6,7-6 |
| WTA Bogota | 2019/04/06 15:30 | Maria F Herazo Gonzalez v Anna Zaja | 6-1,2-6,6-3 |
| WTA Charleston | 2019/03/30 18:55 | Shuko Aoyama v Anna Zaja | 7-6,6-4 |
| ITF W25 Macon | 2019/02/28 09:00 | Anna Zaja v Eleonora Molinaro | 2-6,3-6 |
| ITF W25 Macon | 2019/02/27 10:30 | Anna Zaja v Tessah Andrianjafitrimo | 6-2,6-4 |
| ITF W25 Glasgow | 2019/02/22 10:00 | Anna Zaja v Jessika Ponchet | 1-6,3-6 |