Stadium: Court 1 Round: 44 Ground: Clay
| ITF - M15 Warmbad-Villach | 2021/08/17 08:00 | Martin Zeljenka v Gabriel Decamps | 2-6,2-6 |
| ITF - M15 Bad Waltersdorf | 2021/08/22 09:00 | Petr Hajek v Gabriel Decamps | 6-7,2-6 |
| ITF - M15 Warmbad-Villach | 2021/08/21 11:00 | Peter Heller v Gabriel Decamps | 7-5,6-2 |
| ITF - M15 Warmbad-Villach | 2021/08/20 12:50 | Gabriel Decamps v Lukas Krainer | 6-2,6-3 |
| ITF - M15 Warmbad-Villach | 2021/08/19 10:45 | Daniele Capecchi v Gabriel Decamps | 7-5,2-6,2-6 |
| ITF - M15 Warmbad-Villach | 2021/08/18 12:45 | Gabriel Decamps v Jonas Trinker | 6-1,7-6 |
| ITF - M15 Warmbad-Villach | 2021/08/17 08:00 | Martin Zeljenka v Gabriel Decamps | 2-6,2-6 |
| ITF - M15 Warmbad-Villach | 2021/08/15 07:00 | Jonas Greif v Gabriel Decamps | 0-6,2-6 |
| ITF - M15 Frederiksberg | 2021/08/04 07:50 | Benjamin Hannestad v Gabriel Decamps | 6-4,6-2 |
| ITF - M15 Bad Waltersdorf | 2021/08/22 07:00 | Marco De Rosa v Martin Zeljenka | 4-6,5-7 |
| ITF - M15 Warmbad-Villach | 2021/08/17 08:00 | Martin Zeljenka v Gabriel Decamps | 2-6,2-6 |
| ITF - M15 Warmbad-Villach | 2021/08/15 07:00 | Erwin Troebinger v Martin Zeljenka | 5-7,1-6 |
| ITF - M25 Pitesti | 2021/08/02 10:00 | Martin Zeljenka v Vladislav Melnic | 3-6,6-7 |
| ITF - M25 Pitesti | 2021/08/01 13:30 | Martin Zeljenka v Samuil Konov | 6-4,6-4 |
| ITF - M15 Novi Sad | 2021/07/25 07:00 | Martin Zeljenka v Danilo Raicevic | 4-6,4-6 |
| ITF - M25 Kottingbrunn | 2021/07/19 12:25 | Peter Goldsteiner v Martin Zeljenka | 6-4,7-6 |
| ITF - M25 Kottingbrunn | 2021/07/18 07:30 | Martin Zeljenka v Rafael Kis Balazs | 2-6,6-4,10-2 |