Stadion: Court 09 Round: 26 Ground: Clay
| ITF - M15 - Warmbad-Villach | 2021/08/18 08:00 | Matic Spec v Lorenzo Vatteroni | 6-3,6-0 |
| ITF - M15 - Novi Sad | 2021/08/05 14:20 | Matic Spec v Gorazd Srbljak | 4-6,2-6 |
| ITF - M15 - Novi Sad | 2021/07/28 09:35 | Matic Spec v Mariano Navone | 1-6,6-4,1-6 |
| ITF - M15 - Novi Sad | 2021/07/27 07:30 | Matic Spec v Koray Kirci | 6-3,7-5 |
| ITF - M15 - Novi Sad | 2021/07/25 12:00 | Matic Spec v Daniil Savelev | 6-1,6-3 |
| ITF - M15 - Prijedor | 2021/05/09 12:30 | Matic Spec v Luka Miklavcic | 3-6,6-3,8-10 |
| ITF - M15 - St. Petersburg | 2021/04/17 09:45 | Matic Spec v Yanki Erel | 6-7,2-6 |
| ITF - M15 - St. Petersburg | 2021/04/16 07:55 | Matic Spec v Alexey Zakharov | 6-2,6-4 |
| ITF - M15 - Warmbad-Villach | 2021/08/17 14:50 | Lukas Neumayer v Quentin Folliot | 7-5,6-1 |
| ATP - Kitzbühel | 2021/07/27 10:35 | Mario Vilella Martinez v Lukas Neumayer | 6-7,7-5,6-4 |
| ATP - Kitzbühel | 2021/07/25 11:20 | Lukas Neumayer v Lukas Rosol | 6-4,7-6 |
| ITF - M25 - Kottingbrunn | 2021/07/21 09:30 | Martin Krumich v Lukas Neumayer | 7-5,6-2 |
| ITF - M25 - Telfs | 2021/07/18 14:30 | Bogdan Ionut Apostol v Lukas Neumayer | 6-7,6-2,6-4 |
| ITF - M25 - Telfs | 2021/07/18 10:00 | Gonzalo Lama v Lukas Neumayer | 6-7,6-7 |
| ITF - M25 - Telfs | 2021/07/16 11:00 | Giovanni Oradini v Lukas Neumayer | 4-6,4-6 |
| ITF - M25 - Telfs | 2021/07/14 16:00 | Lukas Neumayer v Pavel Nejedly | 2-6,6-4,6-1 |