Stadium: Court 2 Round: 25 Ground: Hardcourt outdoor
| ITF - Idanha-A-Nova M25 | 2021/07/20 08:00 | Garrett Johns v Raphael Lambling | 7-6,2-6,10-3 |
| ITF - Idanha-A-Nova M25 | 2021/07/18 08:00 | Garrett Johns v Henrique Rocha | 6-3,6-1 |
| ITF - Idanha-A-Nova M25 | 2021/07/15 11:30 | Garrett Johns v Anton Matusevich | 3-6,6-1,6-7 |
| ITF - Idanha-A-Nova M25 | 2021/07/14 11:50 | Mehluli D A Sibanda v Garrett Johns | 1-6,5-7 |
| ITF - Idanha-A-Nova M25 | 2021/07/13 10:00 | Garrett Johns v Francisco Rocha | 6-4,4-6,10-8 |
| ITF - Idanha-A-Nova M25 | 2021/07/12 15:30 | Garrett Johns v Victor Bini | 6-4,6-1 |
| ITF - Idanha-A-Nova M25 | 2021/07/11 15:30 | Garrett Johns v Ying Hou | 6-2,6-1 |
| ITF - Weston M25 | 2021/06/29 20:45 | Garrett Johns v Michael Zheng | 4-6,6-3,8-10 |
| ITF - Sarajewo M15 | 2021/06/03 09:00 | Gilbert S K Junior v Matheus P De Almeida | 6-4,3-6,3-6 |
| ITF - Sarajewo M15 | 2021/06/02 09:00 | Gilbert S K Junior v Kristjan Tamm | 6-4,6-2 |
| ITF - Kiseljak M25 | 2021/05/26 15:30 | Gilbert S K Junior v David Pichler | 4-6,3-6 |
| ITF - Brcko M15 | 2021/05/21 09:00 | Gilbert S K Junior v Eric Vanshelboim | 6-2,4-6,0-6 |
| ITF - Prijedor M15 | 2021/05/11 12:35 | Luca Giacomini v Gilbert S K Junior | 6-3,1-6,6-1 |
| ITF - Monastir M15 | 2021/04/30 08:25 | Yunseong Chung v Gilbert S K Junior | 6-2,3-6,6-1 |
| ITF - Monastir M15 | 2021/04/29 08:30 | Gilbert S K Junior v Zachary Svajda | 2-6,6-4,6-3 |
| ITF - Monastir M15 | 2021/04/27 08:30 | Gilbert S K Junior v Filip Bergevi | 6-1,6-2 |