Stadium: Court 1 Round: 25 Ground: Clay
| ITF - M15 Warmbad-Villach | 2021/08/19 10:15 | Jakob Aichhorn v Neil Oberleitner | 6-1,4-6,6-4 |
| ITF - M15 Warmbad-Villach | 2021/08/18 10:05 | Neil Oberleitner v Savriyan Danilov | 7-5,7-6 |
| ITF - M25 Frankfurt nad Mohanom | 2021/08/09 09:00 | Lenny Hampel v Neil Oberleitner | 6-4,6-4 |
| ITF - M25 Kottingbrunn | 2021/07/21 12:10 | Neil Oberleitner v Toby Martin | 6-7,5-7 |
| ITF - M25 Telfs | 2021/07/13 07:30 | Neil Oberleitner v Ondrej Horak | 4-6,4-6 |
| ITF - M25 Telfs | 2021/07/12 07:50 | Neil Oberleitner v Jan Jermar | 6-3,6-0 |
| ITF - M15 Šibenik | 2021/04/19 08:00 | Christian Sigsgaard v Neil Oberleitner | 7-6,6-4 |
| ITF - M15 Šibenik | 2021/04/18 08:00 | Matic Dimic v Neil Oberleitner | 7-6,4-6,6-10 |
| ITF - M15 Warmbad-Villach | 2021/08/19 07:55 | Peter Heller v Maximilian Homberg | 7-5,6-1 |
| ITF - M15 Warmbad-Villach | 2021/08/17 14:15 | Bjorn Nareyka v Maximilian Homberg | 1-6,2-6 |
| ITF - M25 Marburg | 2021/07/05 08:00 | Guy Den Heijer v Maximilian Homberg | 6-7,6-2,10-8 |