Stadium: Court 1 Round: 25 Ground: Clay
| ITF M15 Sharm El Sheikh | 2021/03/28 14:30 | Lorenzo Rottoli v Neil Oberleitner | 6-1,3-6,10-8 |
| 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 am Main | 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 Sibenik | 2021/04/19 08:00 | Christian Sigsgaard v Neil Oberleitner | 7-6,6-4 |
| ITF M15 Sibenik | 2021/04/18 08:00 | Matic Dimic v Neil Oberleitner | 7-6,4-6,6-10 |
| ITF M15 Bad Waltersdorf | 2021/08/22 07:00 | Edward Hubner v Lorenzo Rottoli | 6-4,1-6,4-10 |
| ITF M15 Warmbad-Villach | 2021/08/18 13:15 | Lorenzo Rottoli v Franco Emanuel Egea | 1-6,1-6 |
| ITF M15 Parnu | 2021/08/04 12:05 | Lorenzo Rottoli v Luke Johnson | 6-2,6-7,4-6 |
| ITF M15 Monastir | 2021/07/05 14:00 | Lorenzo Rottoli v Valentin Vacherot | 6-4,4-6,7-10 |
| ITF M15 Monastir | 2021/07/05 09:00 | Lorenzo Rottoli v Nikolay Sysoev | 6-1,6-4 |
| ITF M15 Monastir | 2021/07/04 09:00 | Lorenzo Rottoli v Essa Qabazard | 6-2,3-6,10-0 |
| ITF M15 Bergamo | 2021/06/21 07:30 | Andrea Basso v Lorenzo Rottoli | 7-5,6-2 |
| ITF M15 Gaiba | 2021/06/09 14:45 | Lorenzo Rottoli v Mattia Frinzi | 3-6,1-6 |