| Challenger Bad Waltersdorf | 09/19 08:00 | 25 | [343] Ergi Kirkin v Lukas Neumayer [209] | 7-5,2-6,6-1 | |
| Challenger Szczecin | 09/14 11:00 | 26 | [132] Flavio Cobolli v Lukas Neumayer [217] | 6-3,1-6,7-6 | |
| Challenger Szczecin | 09/12 11:10 | 25 | [217] Lukas Neumayer v Facundo Diaz Acosta [99] | 5-7,6-4,6-2 | |
| Challenger Tulln | 09/05 08:00 | 25 | [223] Lukas Neumayer v Vitaliy Sachko [165] | 6-7,6-7 | |
| Challenger Como | 08/31 12:05 | 26 | [106] Thiago Seyboth Wild v Lukas Neumayer [223] | 6-3,6-4 | |
| Challenger Como | 08/29 11:40 | 25 | [284] Nikolas S Izquierdo v Lukas Neumayer [223] | 3-6,7-5,3-6 | |
| Challenger Prague | 08/22 13:45 | 25 | [225] Lukas Neumayer v Gabriel Debru [355] | 6-2,3-6,4-6 | |
| Challenger Cordenons | 08/13 16:00 | 29 | [251] Lukas Neumayer v Matteo Gigante [202] | 0-6,2-6 | |
| Challenger Cordenons | 08/12 17:25 | 28 | [251] Lukas Neumayer v Riccardo Bonadio [199] | 6-2,7-6 | |
| Challenger Cordenons | 08/11 14:40 | 27 | [371] Matteo Martineau v Lukas Neumayer [251] | 6-1,4-6,0-6 | |
| Challenger Cordenons | 08/09 13:00 | 26 | [251] Lukas Neumayer v Lorenzo Rottoli [473] | 6-1,6-4 | |
| Challenger Cordenons | 08/07 16:15 | 25 | [449] Gianmarco Ferrari v Lukas Neumayer [251] | 4-6,2-6 | |
| ATP Kitzbuhel | 07/30 10:45 | 19 | [255] Lukas Neumayer v Hamad Medjedovic [146] | 3-6,1-6 | |
| ATP Kitzbuhel | 07/29 10:25 | 14 | [108] Federico Coria v Lukas Neumayer [255] | 1-6,2-6 | |
| Challenger Verona | 07/27 16:00 | 26 | [312] Stefano Napolitano v Lukas Neumayer [255] | 4-6,6-2,6-3 | |
| Challenger Verona | 07/26 10:35 | 25 | [255] Lukas Neumayer v Genaro Alberto Olivieri [179] | Retired | |
| Challenger Verona | 07/24 09:45 | 19 | [255] Lukas Neumayer v Peter Gojowczyk [348] | 6-2,6-2 | |
| Challenger Verona | 07/23 14:25 | 14 | Lukas Neumayer v Samuele Seghetti | 6-2,6-0 | |
| Challenger Trieste | 07/18 12:00 | 25 | [245] Lukas Neumayer v Vitaliy Sachko [187] | 4-6,6-4,4-6 | |
| Challenger Salzburg | 07/16 09:00 | 29 | [269] Lukas Neumayer v Sebastian Ofner [72] | 3-6,2-6 | |
| Challenger Salzburg | 07/15 11:00 | 28 | Blaz Rola v Lukas Neumayer | 4-6,6-3,5-7 | |
| Challenger Salzburg | 07/14 15:30 | 27 | [95] Thiago Monteiro v Lukas Neumayer [269] | 4-6,4-6 | |
| Challenger Salzburg | 07/13 11:45 | 26 | [269] Lukas Neumayer v Facundo Bagnis [126] | 7-6,7-5 | |
| Challenger Salzburg | 07/10 13:00 | 25 | [225] Sumit Nagal v Lukas Neumayer [269] | 4-6,6-7 | |
| ITF M25 Poprad | 06/22 10:05 | 26 | [267] Lukas Neumayer v Matthew Romios [270] | 6-4,1-6,6-7 | |
| ITF M25 Poprad | 06/21 09:30 | 25 | Lukas Neumayer v Nikita Mashtakov | 3-6,6-3,6-4 | |
| Challenger Bratislava | 06/14 12:05 | 26 | [161] Tomas Barrios Vera v Lukas Neumayer [276] | 5-7,6-3,6-3 | |
| Challenger Bratislava | 06/13 12:00 | 25 | [167] Damir Dzumhur v Lukas Neumayer [276] | 7-6,1-6,4-6 | |
| Challenger Bratislava | 06/12 13:00 | 19 | [276] Lukas Neumayer v Alibek Kachmazov [300] | 6-4,6-2 | |
| Challenger Bratislava | 06/12 08:00 | 45 | Lukas Neumayer v Lukas Palovic | 6-4,7-5 |