Stadium: Court 2 Round: 62 Ground: Clay
| ITF M15 Novi Sad | 2021/08/01 09:45 | Lazar Vojinovic v Ivailo Keremedchiev | 4-6,6-3,6-10 |
| ITF M15 Novi Sad | 2021/07/25 09:30 | Roko Horvat v Lazar Vojinovic | 6-2,3-6,10-3 |
| ITF M15 Doboj | 2021/07/11 08:15 | Rrezart Cungu v Lazar Vojinovic | 6-3,6-3 |
| ITF M15 Sofia | 2021/07/04 10:30 | Radu F Macovei v Lazar Vojinovic | 4-6,7-6,10-4 |
| ITF M15 Sarajevo | 2021/05/30 09:00 | Valentin Lapalu v Lazar Vojinovic | 6-4,7-5 |
| ITF M15 Brcko | 2021/05/19 08:30 | Maximilian Neuchrist v Lazar Vojinovic | 6-3,6-4 |
| ITF M15 Brcko | 2021/05/18 09:30 | Drazen Petrovic v Lazar Vojinovic | 2-6,3-6 |
| ITF M15 Brcko | 2021/05/17 15:30 | Lazar Vojinovic v Luka Petrovic | 6-3,6-4 |