| Podgorica, Singles Qualifying W-ITF-MNE-01A | 09/19 10:20 | 26 | [302] Gerlach, Katharina v Amina Anshba [366] | 0-6,5-7 | |
| Podgorica, Singles Qualifying W-ITF-MNE-01A | 09/18 08:00 | 25 | Gerlach, Katharina v Ipek Oz | 7-6,6-3 | |
| ITF W25 Frydek Mistek | 09/15 09:00 | 29 | [234] Ekaterine Gorgodze v Gerlach, Katharina [297] | 6-1,7-6 | |
| ITF W25 Frydek Mistek | 09/14 10:25 | 28 | [297] Gerlach, Katharina v Martina Colmegna [235] | 6-2,6-0 | |
| ITF W25 Frydek Mistek | 09/13 10:00 | 27 | Anna Siskova v Gerlach, Katharina | 1-6,2-6 | |
| ITF W25 Frydek Mistek | 09/12 12:10 | 26 | [490] Nika Radisic v Gerlach, Katharina [297] | 3-6,2-6 | |
| ITF W25 Frydek Mistek | 09/11 13:15 | 25 | [297] Gerlach, Katharina v Valentini Grammatikopoulou [237] | 6-0,6-2 | |
| ITF W25 Braunschweig | 08/25 09:30 | 29 | Cagla Buyukakcay v Gerlach, Katharina | 6-4,6-2 | |
| ITF W25 Braunschweig | 08/24 12:10 | 28 | [276] Reka-Luca Jani v Gerlach, Katharina [375] | 6-2,6-7,3-6 | |
| ITF W25 Braunschweig | 08/23 13:05 | 27 | [375] Gerlach, Katharina v Ferrando, Cristiana [361] | 6-3,6-2 | |
| ITF W25 Braunschweig | 08/22 11:55 | 26 | [289] Kathinka Von Deichmann v Gerlach, Katharina [375] | 4-6,6-0,3-6 | |
| ITF W25 Braunschweig | 08/21 14:50 | 25 | [375] Gerlach, Katharina v Yana Morderger [330] | 6-2,7-6 | |
| ITF W25 Leipzig | 08/18 11:00 | 29 | [325] Jule Niemeier v Gerlach, Katharina [376] | 6-3,6-3 | |
| ITF W25 Leipzig | 08/17 09:00 | 28 | [376] Gerlach, Katharina v Ivakhnenko, Valentyna [249] | 6-2,6-2 | |
| ITF W25 Leipzig | 08/16 10:20 | 27 | [376] Gerlach, Katharina v Caroline Werner [412] | 6-4,6-4 | |
| ITF W25 Leipzig | 08/15 15:00 | 26 | [358] Oceane Dodin v Gerlach, Katharina [376] | Retired | |
| ITF W25 Leipzig | 08/14 09:00 | 25 | [376] Gerlach, Katharina v Caregaro, Martina [356] | 6-1,6-4 | |
| ITF W60 Hechingen | 08/08 13:30 | 26 | Gerlach, Katharina v Schaeder, Laura | 6-0,4-6,4-6 | |
| ITF W60 Hechingen | 08/08 08:00 | 25 | [240] Julia Grabher v Gerlach, Katharina [442] | 3-6,1-6 | |
| Bad Saulgau, Simples W-ITF-GER-12A | 08/04 11:00 | 29 | [96] Sara Sorribes Tormo v Gerlach, Katharina [339] | 7-6,6-1 | |
| Bad Saulgau, Simples W-ITF-GER-12A | 08/03 14:20 | 28 | Gerlach, Katharina v Stokke, Melanie | 2-6,7-6,6-1 | |
| Bad Saulgau, Simples W-ITF-GER-12A | 08/02 13:50 | 27 | [339] Gerlach, Katharina v Pereira, Teliana [460] | 7-5,6-3 | |
| Bad Saulgau, Simples W-ITF-GER-12A | 08/01 13:30 | 26 | [339] Gerlach, Katharina v Ksenia Laskutova [354] | 6-1,6-2 | |
| Bad Saulgau, Simples W-ITF-GER-12A | 07/31 12:05 | 25 | Gerlach, Katharina v Schaeder, Laura | 6-3,6-2 | |
| ITF W25 Horb | 07/25 11:30 | 26 | [319] Gerlach, Katharina v Lea Boskovic [435] | 4-6,4-6 | |
| ITF W25 Horb | 07/24 13:00 | 25 | Gerlach, Katharina v Angelina Wirges | 6-3,6-1 | |
| ITF W25 Aschaffenburg | 07/20 13:30 | 28 | [320] Gerlach, Katharina v Jule Niemeier [341] | 3-6,6-4,1-6 | |
| ITF W25 Aschaffenburg | 07/19 11:30 | 27 | Ekaterina Makarova v Gerlach, Katharina | 0-6,2-6 | |
| ITF W25 Aschaffenburg | 07/18 11:00 | 26 | Matvienko, Lisa v Gerlach, Katharina | Retired | |
| ITF W25 Aschaffenburg | 07/17 12:25 | 25 | Julia Stamatova v Gerlach, Katharina | 4-6,3-6 |