Stadium: Court 16 Round: 25 Ground: Clay
| ITF M15 - Madrid | 2023/11/30 10:45 | Colin Markes v John Echeverria | 7-5,4-6,6-7 |
| ITF M15 - Madrid | 2023/11/29 11:40 | A.J Catanzariti v Colin Markes | 6-7,7-5,4-6 |
| Challenger - Drummondville | 2023/11/14 19:15 | Colin Markes v Michael Vrbensky | 4-6,6-3,3-6 |
| Challenger - Drummondville | 2023/11/13 16:40 | Nicaise Muamba v Colin Markes | 2-6,4-6 |
| Challenger - Drummondville | 2023/11/12 19:00 | Kuang Qing Xu v Colin Markes | 4-6,3-6 |
| ITF M25 - Austin | 2023/11/10 16:00 | Colin Markes v Eliot Spizzirri | 1-6,2-6 |
| ITF M25 - Austin | 2023/11/09 14:55 | Mark Whitehouse v Colin Markes | 6-1,5-7,6-10 |
| ITF M25 - Austin | 2023/11/08 21:20 | Tiago Torres v Colin Markes | 6-2,3-6,0-6 |
| ITF M15 - Madrid | 2023/11/29 12:00 | Alejandro M Kretzer v John Echeverria | 4-6,5-7 |
| ITF - M15 Valencia | 2023/11/17 08:55 | Alejandro M Kretzer v Carlos Gimeno Valero | 3-6,1-6 |
| ITF - M15 Valencia | 2023/11/16 11:30 | Alejandro Manzanera Pertusa v Alejandro M Kretzer | 4-6,6-2,3-6 |
| ITF - M15 Valencia | 2023/11/15 08:20 | Alejandro M Kretzer v David Naharro | 6-4,2-6,7-5 |
| ITF - M25 Benicarlo | 2023/11/06 09:00 | Nil Regas Luis v Alejandro M Kretzer | 6-3,2-6,10-4 |
| ITF - M25 Benicarlo | 2023/11/05 08:30 | Peetu Pohjola v Alejandro M Kretzer | 3-6,3-6 |
| ITF M15 - Castellón | 2023/10/17 09:00 | Alvaro Lopez San Martin v Alejandro M Kretzer | 6-4,6-2 |
| ITF M15 - Vigo | 2023/10/12 09:35 | Liam Gavrielides v Alejandro M Kretzer | 6-3,6-3 |