| ITF Women Braunschweig | 08/21 10:00 | 25 | [355] Maria F Herazo Gonzalez v Gerlach, Katharina [319] | 2-6,6-2,6-1 | |
| ITF Women Braunschweig | 08/20 09:00 | 54 | Gerlach, Katharina v Rosa Vicens Mas | 6-4,6-4 | |
| ITF Women Hechingen Qual | 08/07 11:00 | 54 | [163] Tamara Korpatsch v Gerlach, Katharina [329] | 6-3,6-2 | |
| ITF Women Hechingen Qual | 08/06 15:00 | 54 | Januskova, Petra v Gerlach, Katharina | 0-6,4-6 | |
| ITF Women Hechingen Qual | 08/05 13:30 | 54 | [496] Pantuckova, Gabriela v Gerlach, Katharina [428] | 0-6,2-6 | |
| ITF Women Bad Saulgau | 08/03 16:00 | 27 | [428] Gerlach, Katharina v Laura Siegemund [185] | 0-6,1-6 | |
| ITF Women Bad Saulgau | 08/02 12:35 | 26 | [355] Scholsen, Helene v Gerlach, Katharina [428] | 3-6,3-6 | |
| ITF Women Bad Saulgau | 08/01 15:20 | 25 | [445] Kordolaimi, Eleni v Gerlach, Katharina [428] | 2-6,4-6 | |
| ITF Women Horb | 07/29 13:00 | 29 | [367] Piter, Katarzyna v Gerlach, Katharina [290] | 6-4,3-6,6-7 | |
| ITF Women Horb | 07/28 11:30 | 28 | [323] Polina Leykina v Gerlach, Katharina [290] | 1-6,4-6 | |
| ITF Women Horb | 07/27 12:30 | 27 | [290] Gerlach, Katharina v Chiara Scholl [238] | 6-1,6-2 | |
| ITF Women Horb | 07/26 15:45 | 26 | [365] Federica Di Sarra v Gerlach, Katharina [290] | 1-6,1-6 | |
| ITF Women Horb | 07/25 17:15 | 25 | [290] Gerlach, Katharina v Juhaszova, Vivien [398] | 6-4,6-7,6-2 | |
| ITF Women Darmstadt | 07/22 11:00 | 29 | [246] Bolsova Zadoinov, Aliona v Gerlach, Katharina [290] | 6-2,6-1 | |
| ITF Women Darmstadt | 07/21 12:00 | 28 | [395] Koelzer, Romy v Gerlach, Katharina [290] | 5-7,3-6 | |
| ITF Women Darmstadt | 07/20 15:30 | 27 | Gerlach, Katharina v Melanie Klaffner | 7-5,6-1 | |
| ITF Women Darmstadt | 07/19 11:00 | 26 | [272] Isabella Shinikova v Gerlach, Katharina [290] | 7-6,2-6,4-6 | |
| ITF Women Darmstadt | 07/18 13:00 | 25 | Schech, Ruxandra v Gerlach, Katharina | 1-6,3-6 | |
| ITF Women Versmold | 07/11 15:00 | 25 | [493] Gerlach, Katharina v Cagla Buyukakcay [186] | 6-2,4-6,5-7 | |
| ITF Women Aschaffenburg | 07/04 13:00 | 25 | Gerlach, Katharina v Halbauer, Elizabeth | 4-6,6-1,1-6 | |
| ITF Women Stuttgart | 06/27 11:00 | 25 | Panova, Alexandra v Gerlach, Katharina | 7-5,6-4 | |
| ITF Women Kaltenkirchen | 06/20 09:00 | 25 | Gerlach, Katharina v Wargnier, Lucie | 2-6,6-0,4-6 | |
| ITF Women Essen | 06/12 10:30 | 25 | [260] Ekaterine Gorgodze v Gerlach, Katharina [401] | 6-0,1-6,6-1 | |
| WTA Nurnberg Qual | 05/19 13:05 | 45 | [400] Gerlach, Katharina v Zaja, Anna [248] | 6-7,3-6 | |
| Balatonboglar, Simples W-WITF-HUN-08A | 05/02 10:55 | 26 | Kaja Juvan v Gerlach, Katharina | 6-2,6-1 | |
| Balatonboglar, Simples W-WITF-HUN-08A | 05/01 09:40 | 25 | Gerlach, Katharina v Dalma Galfi | 6-3,4-6,6-2 | |
| WTA Stuttgart Qual | 04/21 11:45 | 45 | [60] Su-Wei Hsieh v Gerlach, Katharina [391] | 2-6,7-5,6-2 | |
| ITF Women Santa Margherita Qual | 03/27 13:00 | 44 | [314] Di Giuseppe, Martina v Gerlach, Katharina [384] | 6-3,7-5 | |
| ITF Women Santa Margherita Qual | 03/21 10:30 | 44 | [319] Tena Lukas v Gerlach, Katharina [384] | 6-4,6-2 | |
| ITF Women Santa Margherita Qual | 03/19 13:00 | 44 | Vrljic, Ana v Gerlach, Katharina | 4-6,3-6 |