Stadium: Court 3 Round: 25 Ground: Hardcourt outdoor
| Challenger Granby | 2023/07/17 14:00 | Joshua Sheehy v Colin Markes | 6-2,6-7,7-5 |
| Challenger Granby | 2023/07/16 15:00 | Colin Markes v Ernesto Escobedo | 6-1,6-3 |
| ITF M25 Dallas | 2023/07/12 15:00 | Franco Ribero v Colin Markes | 4-6,6-3,7-6 |
| ITF M25 Tulsa | 2023/06/21 15:40 | Jack Pinnington Jones v Colin Markes | 6-2,6-2 |
| ITF M15 San Diego | 2023/06/15 17:00 | Alexander Kotzen v Colin Markes | 6-2,6-2 |
| ITF M15 San Diego | 2023/06/14 19:15 | Jaycer Lyeons v Colin Markes | 7-6,3-6,3-6 |
| Challenger Little Rock | 2023/05/29 15:00 | Beibit Zhukayev v Colin Markes | 6-0,6-3 |
| Challenger Little Rock | 2023/05/28 17:35 | Colin Markes v Strong Kirchheimer | 5-7,7-6,7-6 |
| ITF M25 Edwardsville | 2023/07/25 16:10 | Joshua Lapadat v Alejandro Moreno | 4-6,7-5,4-10 |
| ITF M25 Edwardsville | 2023/07/24 14:00 | Esunge Ndumbe v Alejandro Moreno | 6-7,1-6 |
| ITF M25 Dallas | 2023/07/12 16:25 | Blake Ellis v Alejandro Moreno | 6-3,7-6 |
| ITF M25 Dallas | 2023/07/11 16:35 | Benjamin Kittay v Alejandro Moreno | 5-7,6-7 |
| ITF M25 Dallas | 2023/07/10 15:00 | Alexander Stafford v Alejandro Moreno | 3-6,3-6 |
| ITF M25 Tulsa | 2023/06/22 15:00 | Alejandro Moreno v Adam Neff | 6-4,6-7,2-6 |
| ITF M25 Tulsa | 2023/06/21 15:30 | Alejandro Moreno v Hank Trondson | 6-3,6-1 |
| ITF M25 Tulsa | 2023/06/20 13:00 | Braden Shick v Alejandro Moreno | 3-6,3-6 |