Stadium: Court 13 Round: 25 Ground: Hardcourt outdoor
| 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 |
| ITF W25 - Mildura | 2019/03/05 02:40 | Katharina Gerlach v Hiroko Kuwata | 6-3,3-6,6-3 |
| ITF W25 - Altenkirchen | 2019/02/18 18:45 | Katharina Gerlach v Stephanie Wagner | 6-3,3-6,5-10 |
| ITF W25 - Altenkirchen | 2019/02/18 13:55 | Katharina Gerlach v Emily Webley-Smith | 6-2,6-4 |
| ITF W60 Shrewsbury | 2019/02/11 10:00 | Kimberley Zimmermann v Katharina Gerlach | 6-3,6-3 |
| ITF W100 - Midland | 2019/01/28 15:00 | Quinn Gleason v Katharina Gerlach | 2-6,6-2,10-7 |
| WTA Newport Beach | 2019/01/21 20:20 | Harmony Tan v Katharina Gerlach | 6-4,6-2 |
| ITF W25 - Mildura | 2019/03/06 02:00 | Olivia Tjandramulia v Ellen Perez | 4-6,2-6 |
| ITF W25 - Osaka | 2019/02/25 02:30 | Risa Ozaki v Olivia Tjandramulia | 4-6,7-6,10-5 |
| ITF W60 - Kyoto | 2019/02/18 03:30 | Akiko Omae v Olivia Tjandramulia | 6-1,6-0 |
| ITF W25 - Singapore | 2019/01/24 02:00 | Olivia Tjandramulia v Barbara Haas | 2-6,2-6 |
| ITF W25 - Singapore | 2019/01/23 02:00 | Julyette M J Steur v Olivia Tjandramulia | 0-6,1-6 |
| ITF W25 - Singapore | 2019/01/22 02:00 | Victoria Rodriguez v Olivia Tjandramulia | 6-1,5-7,7-10 |
| ITF W25 - Singapore | 2019/01/17 02:00 | Olivia Tjandramulia v Barbara Haas | 4-6,1-6 |
| ITF W25 - Singapore | 2019/01/16 02:00 | Victoria Rodriguez v Olivia Tjandramulia | 3-6,2-6 |