Stadium: Court 4 Round: 62 Ground: Clay
| ITF M15 Bad Waltersdorf | 2021/08/30 07:00 | Lorenzo Favero v Martin Zeljenka | 1-6,6-4,2-10 |
| ITF M15 Bad Waltersdorf | 2021/08/23 07:00 | Gabriel Decamps v Martin Zeljenka | 6-1,6-1 |
| 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 M15 Bad Waltersdorf | 2021/08/23 09:00 | Matic Spec v Giorgio Tabacco | 6-4,6-3 |
| ITF M15 Bad Waltersdorf | 2021/08/22 09:00 | Michael Gloeckler v Giorgio Tabacco | 6-7,6-7 |
| ITF M15 Pescara | 2021/08/20 10:15 | Giorgio Tabacco v Emiliano Maggioli | 0-6,2-6 |
| ITF M15 Pescara | 2021/08/19 10:45 | Marcello Serafini v Giorgio Tabacco | 4-6,6-7 |
| ITF M15 Pescara | 2021/08/18 08:30 | Giorgio Tabacco v Oleksandr Ovcharenko | 6-4,3-6,6-1 |
| ITF M15 Pescara | 2021/08/16 07:30 | Manuel Mazza v Giorgio Tabacco | 6-2,4-6,5-10 |
| ITF M15 Pescara | 2021/08/15 07:15 | Giorgio Tabacco v Cristian Campese | 6-4,6-2 |
| ITF M25 Bolzano | 2021/08/04 10:05 | Federico Arnaboldi v Giorgio Tabacco | 6-3,6-1 |