| ITF Damen - W60 - Versmold | 07/10 12:00 | 25 | [319] Katharina Gerlach v Elitsa Kostova [220] | 3-6,5-7 | |
| ITF Damen - W25 - Stuttgart | 07/02 16:30 | 25 | [319] Katharina Gerlach v Caroline Werner [409] | 0-6,3-6 | |
| ITF Damen - W25 - Darmstadt | 06/25 15:45 | 25 | [260] Olga Govortsova v Katharina Gerlach [315] | 6-1,6-1 | |
| ITF Damen - W25 - Klosters | 06/19 07:00 | 25 | Katharina Gerlach v Joanne Zuger | 4-6,2-6 | |
| WTA - Nürnberg | 05/19 10:15 | 64 | [211] Jana Cepelova v Katharina Gerlach [331] | 3-6,6-4,6-4 | |
| WTA - Nürnberg | 05/18 12:35 | 45 | [331] Katharina Gerlach v Pemra Ozgen [252] | 6-3,6-0 | |
| ITF Damen - W60 - Wiesbaden | 05/01 12:10 | 25 | [325] Katharina Gerlach v Anna Zaja [188] | 4-6,6-3,0-6 | |
| ITF Damen - W25 - Tunis | 04/11 11:50 | 26 | [469] Lara Salden v Katharina Gerlach [330] | 6-2,7-5 | |
| ITF Damen - W25 - Tunis | 04/10 12:00 | 25 | [424] Martina Caregaro v Katharina Gerlach [330] | 7-5,1-6,3-6 | |
| ITF Damen - W25 - Canberra | 03/27 04:50 | 25 | [405] Leylah Annie Fernandez v Katharina Gerlach [335] | 6-3,3-6,6-4 | |
| ITF Damen - W25 - Canberra | 03/22 01:15 | 27 | [335] Katharina Gerlach v Destanee Aiava [202] | 2-6,6-4,1-6 | |
| ITF Damen - W25 - Canberra | 03/21 01:20 | 26 | [258] Cagla Buyukakcay v Katharina Gerlach [335] | 6-7,3-6 | |
| ITF Damen - W25 - Canberra | 03/20 02:15 | 25 | [335] Katharina Gerlach v Olivia Tjandramulia [383] | 6-3,6-2 | |
| ITF Damen - W25 - Mildura | 03/08 02:20 | 27 | Lulu Sun v Katharina Gerlach | 6-2,6-0 | |
| ITF Damen - W25 - Mildura | 03/06 23:00 | 26 | Alana Parnaby v Katharina Gerlach | 2-6,6-7 | |
| ITF Damen - W25 - Mildura | 03/05 02:40 | 25 | [353] Katharina Gerlach v Hiroko Kuwata [266] | 6-3,3-6,6-3 | |
| ITF Damen - W25 - Altenkirchen | 02/18 18:45 | 45 | [349] Katharina Gerlach v Stephanie Wagner [490] | 6-3,3-6,5-10 | |
| ITF Damen - W25 - Altenkirchen | 02/18 13:55 | 45 | [349] Katharina Gerlach v Emily Webley-Smith [494] | 6-2,6-4 | |
| ITF Damen - W60 - Shrewsbury | 02/11 10:00 | 45 | [242] Kimberley Zimmermann v Katharina Gerlach [345] | 6-3,6-3 | |
| ITF Damen - W100 Midland | 01/28 15:00 | 45 | [375] Quinn Gleason v Katharina Gerlach [342] | 2-6,6-2,10-7 | |
| WTA - Newport Beach | 01/21 20:20 | 24 | [308] Harmony Tan v Katharina Gerlach [333] | 6-4,6-2 | |
| ITF Damen - Pune | 11/28 06:55 | 26 | [291] Valeriya Strakhova v Katharina Gerlach [349] | 7-6,7-5 | |
| ITF Damen - Pune | 11/26 04:30 | 25 | Katharina Gerlach v Riya Bhatia | 6-0,6-3 | |
| ITF Damen - Pune | 11/25 07:25 | 54 | [350] Katharina Gerlach v Eden Silva [474] | 6-2,6-2 | |
| ITF Damen - Pune | 11/24 06:15 | 54 | [350] Katharina Gerlach v Melanie Klaffner [445] | 6-2,7-5 | |
| ITF Damen - Shrewsbury | 11/06 14:15 | 25 | [355] Katharina Gerlach v Anna Zaja [222] | 4-6,4-6 | |
| ITF Damen - Wirral | 10/30 13:15 | 25 | [310] Greet Minnen v Katharina Gerlach [350] | 6-3,6-3 | |
| ITF Damen - Oslo | 10/23 08:00 | 25 | [350] Katharina Gerlach v Katarzyna Piter [296] | 4-6,2-6 | |
| WTA - Luxemburg | 10/13 14:20 | 45 | [336] Katharina Gerlach v Greet Minnen [349] | 7-5,3-6,1-6 | |
| ITF Damen - Santa Margherita | 09/19 12:00 | 25 | [242] Anastasia Grymalska v Katharina Gerlach [336] | 6-4,6-4 |