| Challenger - Meerbusch | 08/09 11:30 | 25 | [376] Lucas Gerch v Mats Moraing [151] | 6-4,4-6,4-6 | |
| Challenger - Meerbusch | 08/08 09:00 | 19 | [365] Thiago Seyboth Wild v Lucas Gerch [381] | 6-7,4-6 | |
| Challenger - Meerbusch | 08/07 09:00 | 14 | John Sperle v Lucas Gerch | 5-7,2-6 | |
| Challenger - Liberec | 08/01 08:00 | 19 | [320] Yshai Oliel v Lucas Gerch [381] | 6-4,6-4 | |
| Challenger - Liberec | 07/31 12:35 | 14 | Jonas Kucera v Lucas Gerch | 6-7,1-6 | |
| Challenger Zug | 07/25 11:35 | 19 | [339] Kimmer Coppejans v Lucas Gerch [379] | 6-4,6-1 | |
| Challenger Zug | 07/24 11:20 | 14 | [432] Damien Wenger v Lucas Gerch [354] | 3-6,2-6 | |
| Challenger - Oeiras | 06/21 10:00 | 25 | [365] Lucas Gerch v Facundo Bagnis [110] | 6-3,6-7,3-6 | |
| Challenger - Oeiras | 06/20 11:30 | 19 | [365] Lucas Gerch v Alibek Kachmazov [372] | 6-1,6-3 | |
| Challenger - Oeiras | 06/19 13:55 | 14 | [349] Lucas Gerch v Jaime Faria [461] | 6-3,7-6 | |
| ITF M25 - Grasse | 06/16 08:00 | 26 | Emilien Voisin v Lucas Gerch | 6-0,7-6 | |
| ITF M25 - Grasse | 06/14 11:10 | 25 | [494] Remy Bertola v Lucas Gerch [349] | 3-6,2-6 | |
| Challenger - Poznań | 05/30 08:30 | 19 | [278] Daniel Michalski v Lucas Gerch [368] | 7-5,5-7,6-0 | |
| Challenger - Poznań | 05/29 09:00 | 14 | Blazej Sopolinski v Lucas Gerch | 1-6,3-6 | |
| Challenger - Troisdorf | 05/26 11:00 | 26 | [217] Evgeny Donskoy v Lucas Gerch [368] | 6-3,6-4 | |
| Challenger - Troisdorf | 05/25 09:00 | 25 | [282] Kimmer Coppejans v Lucas Gerch [368] | 2-6,0-6 | |
| Challenger - Troisdorf | 05/23 09:30 | 19 | [368] Lucas Gerch v Arthur Fils [409] | 7-6,6-3 | |
| Challenger - Troisdorf | 05/22 09:30 | 14 | Lucas Gerch v Tim Loosen | 6-1,6-1 | |
| ATP - Geneva | 05/14 13:30 | 14 | [367] Lucas Gerch v Vitaliy Sachko [235] | 6-7,3-6 | |
| Challenger - Praag | 05/03 11:05 | 25 | [261] Jonas Forejtek v Lucas Gerch [367] | 7-5,4-6,6-3 | |
| Challenger - Praag | 05/02 08:30 | 19 | [282] Kaichi Uchida v Lucas Gerch [367] | 3-6,1-6 | |
| Challenger - Praag | 05/01 08:30 | 14 | [371] Otto Virtanen v Lucas Gerch [364] | 7-5,3-6,1-6 | |
| Challenger - Barletta | 04/12 09:40 | 25 | [367] Lucas Gerch v Andrea Pellegrino [201] | 6-2,3-6,3-6 | |
| Challenger - Barletta | 04/11 09:30 | 19 | [289] Alexey Vatutin v Lucas Gerch [367] | 1-6,1-6 | |
| Challenger - Oeiras | 04/06 13:20 | 26 | [208] Dimitar Kuzmanov v Lucas Gerch [386] | 6-2,6-1 | |
| Challenger - Oeiras | 04/05 10:50 | 25 | [386] Lucas Gerch v Filip C Jianu [308] | 6-3,6-4 | |
| Challenger - Oeiras | 04/04 10:50 | 19 | Lucas Gerch v Simone Roncalli | 6-4,6-2 | |
| Challenger - Oeiras - Kwal. | 04/03 11:25 | 14 | [395] Lucas Gerch v Kai Wehnelt [346] | 6-2,3-6,6-0 | |
| Challenger - Oeiras | 03/29 14:45 | 25 | [395] Lucas Gerch v Pedro Sousa [268] | 3-6,4-6 | |
| Challenger - Oeiras | 03/28 09:30 | 19 | Alex M Pujolras v Lucas Gerch | 2-6,6-4,3-6 |