Stadium: Court 7 Round: 62 Ground: Clay
| 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 |
| ITF M15 Tabarka | 2019/05/20 13:00 | Alex Knaff v Mauro De Maio | 6-7,6-2,8-10 |
| ITF M15 Skopje | 2021/06/09 09:15 | Admir Kalender v Nicholas David Ionel | 2-6,6-3,0-6 |
| ITF M15 Skopje | 2021/06/08 07:30 | Aziz Ouakaa v Admir Kalender | 3-6,3-6 |
| ITF M15 Skopje | 2021/06/07 08:00 | Admir Kalender v Luka Pavlovic | 6-1,6-4 |
| ITF M15 Skopje | 2021/06/03 08:00 | Alexandar Lazarov v Admir Kalender | 6-1,6-3 |
| ITF M15 Skopje | 2021/06/02 08:00 | Admir Kalender v Savriyan Danilov | 6-1,6-4 |
| ITF M15 Skopje | 2021/06/01 09:30 | Rrezart Cungu v Admir Kalender | 0-6,3-6 |
| ITF M15 Skopje | 2021/05/30 08:00 | Admir Kalender v Stefan Micov | 6-3,6-4 |
| ITF M15 Sibenik | 2021/05/17 10:25 | Duje Kekez v Admir Kalender | 6-4,0-6,10-8 |