Stadium: Court 7 Round: 62 Ground: Clay
| ITF M15 Novi Sad | 2021/07/27 07:30 | Roman Andres Burruchaga v Alen Rogic-Hadzalic | 7-6,6-2 |
| ITF M15 Novi Sad | 2021/07/26 09:00 | Pavle Daljev v Alen Rogic-Hadzalic | 4-6,6-7 |
| ITF M15 Novi Sad | 2021/07/25 07:00 | Goran Zivotic v Alen Rogic-Hadzalic | 4-6,4-6 |
| ITF M25 Velenje | 2021/07/06 10:15 | Alen Rogic-Hadzalic v Michele Vianello | 5-7,4-6 |
| ITF M25 Velenje | 2021/07/05 17:50 | Alen Rogic-Hadzalic v Stevan Popovic | 6-3,6-4 |
| ITF M25 Velenje | 2021/07/04 07:30 | Alen Rogic-Hadzalic v Gasper Bezjak | 7-5,6-4 |
| ITF M15 Prijedor | 2021/05/14 11:00 | Alen Rogic-Hadzalic v Aldin Setkic | 6-3,2-6,5-7 |
| ITF M15 Prijedor | 2021/05/13 07:00 | Alen Rogic-Hadzalic v Maikel De Boes | 6-4,6-7,6-3 |
| ITF M15 Novi Sad | 2021/08/01 14:00 | Alex Knaff v Admir Kalender | 7-5,6-4 |
| ITF M15 Novi Sad | 2021/07/27 09:05 | Alex Knaff v Bekkhan Atlangeriev | 4-6,2-6 |
| ITF M15 Novi Sad | 2021/07/26 12:00 | Alex Knaff v Tomislav Jotovski | 5-7,6-2,11-9 |
| ITF M15 Novi Sad | 2021/07/25 10:45 | Luka Pavlovic v Alex Knaff | 6-7,7-5,13-15 |
| ITF M15 Esch/Alzette | 2021/07/20 15:45 | Marlon Vankan v Alex Knaff | 6-4,6-4 |
| Davis Cup | 2021/06/18 10:30 | Valentin Vacherot v Alex Knaff | 6-2,6-3 |
| Davis Cup | 2021/06/16 09:50 | Alex Knaff v Simon Carr | 3-6,2-6 |
| ITF M15 Tallahassee | 2019/12/04 20:55 | Alex Knaff v Jason Kros | 6-1,3-6,6-7 |