Stadium: Court 3 Round: 14 Ground: Hardcourt outdoor
| ITF M25 Belgrade | 2021/07/01 07:00 | Edoardo Lavagno v Alexander Cozbinov | 6-4,6-3 |
| Davis Cup | 2021/06/25 09:30 | Marco De Rossi v Alexander Cozbinov | 3-6,6-3,3-6 |
| Davis Cup | 2021/06/24 09:30 | Fresk Sylhasi v Alexander Cozbinov | 0-6,1-6 |
| Davis Cup | 2021/06/22 09:25 | Eric Cervos Noguer v Alexander Cozbinov | 0-6,0-6 |
| ITF M15 Skopje | 2021/06/08 10:30 | Alexander Cozbinov v Alexander Weis | 5-7,4-6 |
| ITF M15 Kouvola | 2021/05/28 09:05 | Alessandro Bega v Alexander Cozbinov | 6-4,6-0 |
| ITF M15 Kouvola | 2021/05/27 09:55 | Karl Kiur Saar v Alexander Cozbinov | 0-6,1-6 |
| ITF M15 Kouvola | 2021/05/26 07:20 | Dominik Palan v Alexander Cozbinov | 6-7,2-6 |
| ITF M15 Sofia | 2021/07/08 09:10 | Alexandar Lazarov v Andrew Fenty | 3-6,6-1,5-7 |
| ITF M15 Sofia | 2021/07/06 08:00 | Alexandar Lazarov v Dinko Dinev | 6-1,6-2 |
| ITF M25 Belgrade | 2021/07/03 09:55 | Alexandar Lazarov v Nick Hardt | 2-6,1-6 |
| ITF M25 Belgrade | 2021/07/02 07:00 | Alexandar Lazarov v Edoardo Lavagno | 6-2,6-0 |
| ITF M25 Belgrade | 2021/06/30 12:45 | Luka Petrovic v Alexandar Lazarov | 0-6,2-6 |
| ITF M15 Skopje | 2021/06/13 08:55 | Miljan Zekic v Alexandar Lazarov | 6-4,7-6 |
| ITF M15 Skopje | 2021/06/12 10:05 | Alexandar Lazarov v Alexis Gautier | 6-4,6-3 |
| ITF M15 Skopje | 2021/06/11 11:15 | Alexandar Lazarov v Ronan Joncour | 6-3,6-1 |