Stadium: Court N1 Round: 27 Ground: Hardcourt outdoor
| ITF M25 Austin | 2021/11/18 17:00 | Christian Langmo v Colin Markes | 3-6,6-3,6-7 |
| ITF M25 Austin | 2021/11/16 17:00 | Colin Markes v Tomas Pinho | 6-0,6-3 |
| ITF M25 Harlingen | 2021/11/09 15:00 | Colin Markes v Francis Casey Alcantara | 4-6,7-6,11-13 |
| ITF M15 Cancun | 2021/09/29 17:35 | Alfredo Perez v Colin Markes | 6-2,7-5 |
| ITF M15 Cancun | 2021/09/28 14:00 | Gabriel Roveri Sidney v Colin Markes | 1-6,4-6 |
| ITF M15 Cancun | 2021/09/27 14:30 | Colin Markes v Austin Ansari | 4-6,4-6 |
| ITF M15 Cancun | 2021/09/26 17:00 | Diego Bustamante v Colin Markes | 1-6,0-6 |
| ITF M15 Cancun | 2021/09/22 15:55 | Colin Markes v Christian Langmo | 6-7,6-4,2-6 |
| ITF M25 Austin | 2021/11/18 19:30 | Kareem Allaf v Inaki Montes-De La Torre | 6-3,6-4 |
| ITF M25 Austin | 2021/11/17 17:00 | Gabriel Evans v Kareem Allaf | 7-5,2-6,4-6 |
| ITF M25 Austin | 2021/11/16 17:00 | Kareem Allaf v Petro Orlando Fellin | 6-4,6-2 |
| ITF M25 Austin | 2021/11/15 18:00 | Kareem Allaf v Lui Maxted | 6-4,6-1 |
| ITF M25 Harlingen | 2021/11/10 19:30 | Omni Kumar v Kareem Allaf | 7-6,7-6 |
| ITF M25 Harlingen | 2021/11/09 16:50 | Kareem Allaf v Aleksa Ciric | 6-2,7-5 |
| Davis Cup | 2021/09/18 08:15 | Kareem Allaf v Colin Sinclair | 5-7,7-6,4-6 |
| Davis Cup | 2021/09/16 10:20 | Kareem Allaf v Thehan Wijemanne | 6-0,6-4 |