Stadium: Court 21 Round: 26 Ground: Clay
| ITF M15 - Antalya | 2021/10/27 07:00 | Sarp Agabigun v Marsel Ilhan | 6-3,4-6,4-6 |
| ITF M15 - Antalya | 2021/10/21 07:00 | Marsel Ilhan v Billy Harris | 3-6,4-6 |
| ITF M15 - Antalya | 2021/10/20 08:20 | Marsel Ilhan v Federico Campana | 6-3,7-6 |
| ITF M15 - Antalya | 2021/10/13 09:10 | Marsel Ilhan v Mircea-Alexandru Jecan | 4-6,6-3,5-7 |
| ITF M15 Novi Sad | 2021/08/05 12:00 | Mariano Navone v Marsel Ilhan | 6-3,6-1 |
| ITF M15 Novi Sad | 2021/08/03 12:10 | Luka Pavlovic v Marsel Ilhan | 3-6,4-6 |
| ITF M15 Novi Sad | 2021/07/28 07:30 | Gorazd Srbljak v Marsel Ilhan | 6-2,6-4 |
| ITF M15 - Antalya | 2021/07/02 06:25 | Marsel Ilhan v Carlos Sanchez Jover | 2-6,6-7 |
| ITF M15 - Antalya | 2021/10/27 09:45 | Lukas Neumayer v Nicholas David Ionel | 7-6,7-6 |
| ITF M25 Toulouse | 2021/10/22 12:45 | Joris De Loore v Lukas Neumayer | 6-4,6-4 |
| ITF M25 Toulouse | 2021/10/21 14:55 | Lukas Neumayer v Antoine Escoffier | 4-6,6-4,6-3 |
| ITF M25 Toulouse | 2021/10/19 17:35 | Robin Bertrand v Lukas Neumayer | 3-6,2-6 |
| ITF M15 Monastir | 2021/10/06 09:50 | Lohithaksha Bathrinath v Lukas Neumayer | 7-5,1-6,7-5 |
| ITF M15 Monastir | 2021/09/30 08:00 | Guy Den Ouden v Lukas Neumayer | 7-6,6-3 |
| ITF M15 Monastir | 2021/09/29 10:40 | Raphael Collignon v Lukas Neumayer | 5-7,6-3,2-6 |
| Challenger Tulln | 2021/09/07 10:35 | Lukas Neumayer v Jiří Veselý | 5-7,6-7 |