Stadium: Court 1 - Center Round: 54 Ground: Clay
| ITF M15 Warmbad-Villach | 2021/08/15 15:30 | Leonardo Taddia v Patric Prinoth | 6-4,6-0 |
| ITF M25 Telfs | 2021/07/12 11:50 | Patric Prinoth v Martins Rocens | 3-6,7-5,4-10 |
| ITF M15 Gaiba | 2021/06/07 12:30 | Patric Prinoth v Federico Bertuccioli | 4-6,4-6 |
| ITF M25 Meerbusch | 2021/04/12 13:00 | Marvin Netuschil v Patric Prinoth | 6-1,6-1 |
| ITF M15 Antalya | 2021/03/14 07:00 | Patric Prinoth v Sidane Pontjodikromo | 3-6,5-7 |
| ITF M15 Antalya | 2021/02/28 09:00 | Patric Prinoth v Filip Misolic | 1-6,2-6 |
| ITF M15 Monastir | 2021/02/07 08:00 | Patric Prinoth v Liova Ajavon | 2-6,3-6 |
| ITF M15 Monastir | 2021/02/03 08:30 | Liova Ajavon v Patric Prinoth | 6-2,6-2 |