Stadium: Center Court Round: 25 Ground: Clay
| Challenger Poznan | 2023/06/21 11:20 | Facundo Diaz Acosta v Sumit Nagal | 6-1,2-6,6-4 |
| Challenger Poznan | 2023/06/20 11:15 | Sumit Nagal v Leo Borg | 6-2,6-3 |
| Challenger Bratislava | 2023/06/12 15:30 | Zsombor Piros v Sumit Nagal | 6-2,7-5 |
| Challenger Troisdorf | 2023/06/03 12:30 | Sumit Nagal v Frederico Ferreira Silva | 2-6,6-3,4-6 |
| Challenger Troisdorf | 2023/06/02 10:30 | Oleksii Krutykh v Sumit Nagal | 1-6,6-1,4-6 |
| Challenger Troisdorf | 2023/05/30 12:45 | Dimitar Kuzmanov v Sumit Nagal | 3-6,6-1,5-7 |
| Challenger Troisdorf | 2023/05/29 08:30 | Sumit Nagal v Robert Strombachs | 1-6,6-7 |
| Challenger Troisdorf | 2023/05/28 10:05 | Sumit Nagal v Sergey Fomin | 6-1,6-1 |
| ITF M25 Poprad | 2023/06/22 10:05 | Lukas Neumayer v Matthew Romios | 6-4,1-6,6-7 |
| ITF M25 Poprad | 2023/06/21 09:30 | Lukas Neumayer v Nikita Mashtakov | 3-6,6-3,6-4 |
| Challenger Bratislava | 2023/06/14 12:05 | Tomas Barrios Vera v Lukas Neumayer | 5-7,6-3,6-3 |
| Challenger Bratislava | 2023/06/13 12:00 | Damir Dzumhur v Lukas Neumayer | 7-6,1-6,4-6 |
| Challenger Bratislava | 2023/06/12 13:00 | Lukas Neumayer v Alibek Kachmazov | 6-4,6-2 |
| Challenger Bratislava | 2023/06/12 08:00 | Lukas Neumayer v Lukas Palovic | 6-4,7-5 |
| ITF M25 Jablonec Nad Nisou | 2023/06/04 08:00 | Lukas Neumayer v Tim Handel | 6-2,3-6,6-1 |
| ITF M25 Jablonec Nad Nisou | 2023/06/02 11:30 | Lukas Neumayer v Stuart Parker | 6-3,6-3 |