Stadium: Court 6 Round: 62 Ground: Clay
| ITF M15 Sarajevo | 2021/06/01 09:00 | Domagoj Biljesko v Michele Vianello | 6-3,6-4 |
| ITF M15 Pirot | 2021/09/22 08:00 | Domagoj Biljesko v Calin Manda | 1-6,4-6 |
| ITF M15 Zlatibor | 2021/09/16 08:00 | Domagoj Biljesko v Oleg Prihodko | 2-6,3-6 |
| ITF M15 Zlatibor | 2021/09/15 08:00 | Obrad Markovski v Domagoj Biljesko | 5-7,6-4,2-6 |
| ITF M15 Bad Waltersdorf | 2021/09/01 13:35 | Domagoj Biljesko v David Pichler | 2-6,6-7 |
| ITF M15 Bad Waltersdorf | 2021/08/31 07:00 | Domagoj Biljesko v Hasan Ibrahim | 6-2,6-0 |
| ITF M15 Novi Sad | 2021/08/06 09:00 | Domagoj Biljesko v Francisco Comesana | 2-6,5-7 |
| ITF M15 Novi Sad | 2021/08/04 07:55 | Domagoj Biljesko v Aziz Ouakaa | 5-7,6-1,6-3 |
| ITF M15 Novi Sad | 2021/08/03 08:00 | Domagoj Biljesko v Millen Hurrion | 7-5,6-2 |
| ITF M15 Huy | 2021/08/22 09:10 | Alexis Boureau v Michele Vianello | 6-0,3-6,17-15 |
| ITF M25 Koksijde | 2021/08/17 09:55 | Michele Vianello v Nicolas Tepmahc | 2-6,4-6 |
| ITF M25 Koksijde | 2021/08/16 08:00 | Michele Vianello v Jakub Wojcik | 1-6,6-3,10-3 |
| ITF M25 Koksijde | 2021/08/15 08:00 | Michele Vianello v Cedric Stanke | 7-5,6-0 |
| Challenger Cordenons | 2021/08/01 13:40 | Timofey Skatov v Michele Vianello | 6-4,6-4 |
| ITF M25 Telavi | 2021/07/27 08:35 | Marco De Rossi v Michele Vianello | 1-6,6-3,14-12 |
| ITF M25 Telavi | 2021/07/27 05:00 | David Chelidze v Michele Vianello | 1-6,6-7 |
| ITF M25 Telavi | 2021/07/26 07:30 | Vladislav Gorbatenko v Michele Vianello | 2-6,2-6 |