Stadium: Court 2 Round: 25 Ground: Hardcourt outdoor
| ITF - M25 Idanha-A-Nova | 2021/07/24 08:30 | Gilbert S K Junior v Simon Carr | 2-6,6-7 |
| ITF - M25 Idanha-A-Nova | 2021/07/23 09:00 | Anton Matusevich v Gilbert S K Junior | 3-6,3-6 |
| ITF - M25 Idanha-A-Nova | 2021/07/22 08:00 | Gilbert S K Junior v Roy Smith | 6-3,6-2 |
| ITF - M25 Idanha-A-Nova | 2021/07/21 09:50 | Garrett Johns v Gilbert S K Junior | 5-7,1-6 |
| ITF - M15 Sarajevo | 2021/06/03 09:00 | Gilbert S K Junior v Matheus P De Almeida | 6-4,3-6,3-6 |
| 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 |