| Challenger Lexington | 2023/07/31 17:10 | Aidan Mayo v Colin Markes | 6-2,7-5 |
| Challenger Lexington | 2023/07/30 20:00 | Blu Baker v Colin Markes | 4-6,5-7 |
| ITF M25 Edwardsville | 2023/07/28 00:00 | Aidan Mchugh v Colin Markes | 2-6,6-2,7-5 |
| ITF M25 Edwardsville | 2023/07/26 17:25 | Colin Markes v Alejandro Moreno | 7-6,6-3 |
| 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 |
| UTR Pro San Diego | 2023/07/30 01:00 | Isaiah Strode v Constantinos Djakouris | 7-5,6-1 |
| UTR Pro San Diego | 2023/07/29 01:30 | Constantinos Djakouris v Theodore Dean | 6-1,6-2 |
| UTR Pro San Diego | 2023/07/28 03:15 | Constantinos Djakouris v Tyler Davis | 6-4,7-5 |
| UTR Pro San Diego | 2023/07/27 02:48 | Elijah Strode v Constantinos Djakouris | 6-4,6-4 |
| UTR Pro San Diego | 2023/07/26 00:40 | Luis Humberto Lopez v Constantinos Djakouris | 2-6,4-6 |
| UTR Pro California | 2023/07/23 17:00 | Alexander Kotzen v Constantinos Djakouris | 6-3,7-5 |
| UTR Pro California | 2023/07/22 20:23 | Joshua Charlton v Constantinos Djakouris | 6-4,3-6,2-6 |
| UTR Pro California | 2023/07/21 20:30 | Constantinos Djakouris v Krish Arora | 7-6,6-0 |