Stadium: Court 1 Round: 26 Ground: Clay
| ITF - M15 Sarajevo | 2021/06/02 09:00 | Gilbert S K Junior v Kristjan Tamm | 6-4,6-2 |
| ITF - M25 Kiseljak | 2021/05/26 15:30 | Gilbert S K Junior v David Pichler | 4-6,3-6 |
| ITF - M15 Brcko | 2021/05/21 09:00 | Gilbert S K Junior v Eric Vanshelboim | 6-2,4-6,0-6 |
| ITF - M15 Prijedor | 2021/05/11 12:35 | Luca Giacomini v Gilbert S K Junior | 6-3,1-6,6-1 |
| ITF - M15 Monastir | 2021/04/30 08:25 | Yunseong Chung v Gilbert S K Junior | 6-2,3-6,6-1 |
| ITF - M15 Monastir | 2021/04/29 08:30 | Gilbert S K Junior v Zachary Svajda | 2-6,6-4,6-3 |
| ITF - M15 Monastir | 2021/04/27 08:30 | Gilbert S K Junior v Filip Bergevi | 6-1,6-2 |
| ITF - M15 Monastir | 2021/04/21 08:30 | Gilbert S K Junior v Alexander Donski | 4-6,6-4,3-6 |
| ITF - M15 Sarajevo | 2021/06/02 10:50 | Bozo Barun v Matheus P De Almeida | 3-6,2-6 |
| ITF - M25 Kiseljak | 2021/05/30 12:30 | Matheus P De Almeida v Francesco Forti | 6-4,2-6,6-4 |
| ITF - M25 Kiseljak | 2021/05/29 10:00 | Matheus P De Almeida v Aldin Setkic | 6-4,6-2 |
| ITF - M25 Kiseljak | 2021/05/28 12:00 | Jelle Sels v Matheus P De Almeida | 6-7,3-6 |
| ITF - M25 Kiseljak | 2021/05/27 10:30 | Tim Heger v Matheus P De Almeida | 3-6,3-6 |
| ITF - M25 Kiseljak | 2021/05/26 12:30 | Matheus P De Almeida v Elmar Ejupovic | 6-2,6-2 |
| ITF - M15 Brcko | 2021/05/22 12:15 | Eric Vanshelboim v Matheus P De Almeida | 7-6,6-4 |
| ITF - M15 Brcko | 2021/05/22 07:30 | Matheus P De Almeida v Viktor Jovic | 6-1,6-0 |