Stadium: Court 10 Round: 62 Ground: Clay
| UTR Pro Tennis Series Zadar | 2021/11/19 10:30 | Alen Rogic-Hadzalic v Jerko Brkic | 7-6,5-1 |
| UTR Pro Tennis Series Zadar | 2021/11/18 16:00 | Jerko Brkic v Eduard Shcherbyna | 6-1,6-0 |
| UTR Pro Tennis Series Zadar | 2021/11/16 16:00 | Jerko Brkic v Mario Radev | 6-3,6-1 |
| UTR Pro Tennis Series Zadar | 2021/11/14 16:00 | Jerko Brkic v Janos Fekete | 6-2,6-4 |
| ITF M15 Ulcinj | 2021/09/20 08:00 | Jerko Brkic v Alexandre Aubriot | 1-6,2-6 |
| ITF M15 Ulcinj | 2021/09/19 09:30 | Jerko Brkic v Martin Muedini | 6-1,7-5 |
| ITF M15 Ulcinj | 2021/09/13 08:00 | Gianmarco Ferrari v Jerko Brkic | 6-1,6-3 |
| ITF M15 Ulcinj | 2021/09/12 08:00 | Jerko Brkic v Lior Goldenberg | 6-3,6-0 |
| ITF M15 Antalya | 2021/11/14 06:30 | Lazar Vojinovic v John Sperle | 4-6,3-6 |
| 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 |