| 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 |
| UTR Pro Tennis Series Zadar | 2021/07/04 08:30 | Jerko Brkic v Karlo Kajin | 6-4,6-4 |
| UTR Pro Tennis Series Zadar | 2021/07/02 12:30 | Constant De La Bassetiere v Jerko Brkic | 7-6,5-2 |
| UTR Pro Tennis Series Zadar | 2021/07/01 09:30 | Warren Sinius v Jerko Brkic | 6-3,6-5 |
| UTR Pro Tennis Series Zadar | 2021/06/30 08:00 | Josip Krstanovic v Jerko Brkic | 6-4,5-3 |
| UTR Pro Tennis Series Sofia | 2021/09/01 08:00 | Christos Keisidis v Mario Radev | 6-1,4-6,6-4 |
| UTR Pro Tennis Series Sofia | 2021/08/31 08:00 | Denislav Prodanov v Mario Radev | 6-1,1-6,6-3 |
| UTR Pro Tennis Series Sofia | 2021/08/30 10:45 | Mario Radev v Josh Sheehy | 1-6,2-6 |
| UTR Pro Tennis Series Sofia | 2021/08/29 12:00 | George Lazarov v Mario Radev | 6-0,6-1 |