Estadio: Hard Court 3 Round: 62 Ground: Hardcourt outdoor
| ITF M15 Heraklion | 2021/11/10 14:10 | Jannik Maute v Jonas Trinker | 1-6,7-6,6-2 |
| ITF M15 Heraklion | 2021/11/05 07:00 | Markus Eriksson v Jonas Trinker | 6-0,6-1 |
| ITF M15 Heraklion | 2021/11/04 07:00 | Peter Goldsteiner v Jonas Trinker | 3-6,3-6 |
| ITF M15 Heraklion | 2021/11/03 09:20 | Stephanos Schinas v Jonas Trinker | 3-6,2-6 |
| ITF M15 Selva di Val Gardena | 2021/10/25 16:30 | Jonas Trinker v Federico Iannaccone | 1-6,3-6 |
| ITF M15 Warmbad-Villach | 2021/08/18 12:45 | Gabriel Decamps v Jonas Trinker | 6-1,7-6 |
| ITF M25 Klosters | 2021/06/21 07:00 | Jonas Trinker v Tomas Papik | 5-7,6-3,4-10 |
| Austria - Pro Series | 2020/06/12 14:00 | Lenny Hampel v Jonas Trinker | 6-3,6-4 |
| ITF M15 Heraklion | 2021/11/07 07:00 | Alec Deckers v Ioannis Papounidis | 6-3,7-5 |
| ITF M15 Heraklion | 2021/11/03 11:00 | Ioannis Papounidis v Francesco Maestrelli | 1-6,2-6 |
| ITF M15 Heraklion | 2021/11/02 08:30 | Ioannis Papounidis v Elgin Khoeblal | 4-6,6-2,10-7 |
| ITF M15 Heraklion | 2021/11/01 09:00 | Michael Weindl v Ioannis Papounidis | 3-6,6-2,3-10 |
| ITF M15 Heraklion | 2021/06/08 06:30 | Ioannis Papounidis v Ben Jones | 0-6,4-6 |
| ITF M15 Heraklion | 2021/06/06 07:30 | Petr Hajek v Ioannis Papounidis | 4-6,7-5,6-10 |
| ITF M15 Heraklion | 2021/05/31 06:30 | Ioannis Papounidis v Volodymyr Uzhylovskyi | 3-6,5-7 |
| ITF M15 Heraklion | 2021/05/30 06:30 | Josef Southcombe v Ioannis Papounidis | 6-7,6-4,6-10 |