Stadium: Central Court Round: 14 Ground: Hardcourt indoor
| ITF M15 Bad Waltersdorf | 2021/08/29 07:00 | Lukas Rohseano v Patric Prinoth | 6-3,3-6,13-11 |
| ITF M25 Caslano | 2021/08/23 08:00 | Patric Prinoth v Joao Riquelme | 2-6,6-4,6-10 |
| 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 |
| Challenger Banja Luka | 2021/09/06 09:00 | Aldin Setkic v Martin Cuevas | 6-7,6-2,3-6 |
| Challenger Banja Luka | 2021/09/05 09:00 | Aldin Setkic v Marco Bortolotti | 7-5,6-4 |
| Challenger Warsaw | 2021/08/23 09:00 | Jan Zielinski v Aldin Setkic | 1-6,6-2,7-5 |
| Challenger Warsaw | 2021/08/22 09:00 | Jasza Szajrych v Aldin Setkic | 0-6,4-6 |
| ITF M25 Prostejov | 2021/08/18 07:55 | Lucas Miedler v Aldin Setkic | 6-1,6-4 |
| ITF M25 Prostejov | 2021/08/17 11:50 | Pavel Nejedly v Aldin Setkic | 0-6,2-6 |
| Challenger Prague | 2021/08/08 12:00 | Adrian Andreev v Aldin Setkic | 7-5,6-1 |
| Challenger Trieste | 2021/07/25 15:00 | Aldin Setkic v Viktor Durasovic | 1-6,6-7 |