| UTR Pro Tennis Series Zadar | 2021/09/29 12:00 | Borna Devald v Admir Kalender | 5-7,6-2,1-5 |
| UTR Pro Tennis Series Zadar | 2021/09/28 08:00 | Myroslav Bondar v Admir Kalender | 2-6,2-6 |
| ITF M15 Ulcinj | 2021/09/12 09:30 | Alexandre Aubriot v Admir Kalender | 6-1,6-3 |
| ITF M15 Bad Waltersdorf | 2021/08/25 08:50 | Lukas Krainer v Admir Kalender | 6-4,3-6,6-2 |
| ITF M15 Bad Waltersdorf | 2021/08/23 13:00 | Admir Kalender v Fletcher Scott | 6-4,6-2 |
| ITF M15 Bad Waltersdorf | 2021/08/23 07:00 | Luigi Sorrentino v Admir Kalender | 2-6,1-6 |
| ITF M15 Lodz | 2021/08/16 13:15 | Taiyo Yamanaka v Admir Kalender | 3-6,7-6,10-7 |
| ITF M15 Novi Sad | 2021/08/01 14:00 | Alex Knaff v Admir Kalender | 7-5,6-4 |
| UTR Pro Tennis Series Zadar | 2021/09/28 08:00 | Borna Devald v Alen Rogic-Hadzalic | 3-6,4-5 |
| UTR Pro Tennis Series Zadar | 2021/09/27 15:30 | Alen Rogic-Hadzalic v Jose A R Rodriguez | 7-5,5-3 |
| ITF M15 Bad Waltersdorf | 2021/09/01 09:45 | Alen Rogic-Hadzalic v Lukas Neumayer | 6-7,0-6 |
| ITF M15 Bad Waltersdorf | 2021/08/31 08:20 | Alen Rogic-Hadzalic v Niklas Waldner | 1-6,6-1,10-3 |
| ITF M15 Bad Waltersdorf | 2021/08/27 08:00 | Alen Rogic-Hadzalic v Gabriel Decamps | 2-6,6-7 |
| ITF M15 Bad Waltersdorf | 2021/08/26 11:45 | Matic Spec v Alen Rogic-Hadzalic | 2-6,4-6 |
| ITF M15 Bad Waltersdorf | 2021/08/25 11:45 | Gergely Madarasz v Alen Rogic-Hadzalic | 2-6,3-6 |
| ITF M15 Bad Waltersdorf | 2021/08/23 15:50 | Alen Rogic-Hadzalic v Philip Bachmaier | 6-3,7-5 |