Stadium: Court 2 Round: 62 Ground: Hardcourt outdoor
| ITF M25 - Austin | 2021/11/20 18:45 | Eduardo Nava v Colin Markes | 7-6,6-1 |
| ITF M25 - Austin | 2021/11/19 16:55 | Colin Markes v Kareem Allaf | 6-2,4-6,7-6 |
| 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 |