Stadium: Court 1 Round: 25 Ground: Hardcourt outdoor
| Challenger Fairfield | 2023/10/08 17:00 | Stefan Dostanic v Cozbinov, Alexander | 7-6,6-1 |
| Challenger Tiburon | 2023/10/02 17:00 | Garrett Johns v Cozbinov, Alexander | 6-4,1-6,6-1 |
| Challenger Tiburon | 2023/10/01 17:00 | Cozbinov, Alexander v August Holmgren | 6-3,6-4 |
| Challenger St. Tropez | 2023/09/19 08:00 | Cozbinov, Alexander v Gojowczyk, Peter | 4-6,3-6 |
| Challenger St. Tropez | 2023/09/18 14:40 | Mark Lajal v Cozbinov, Alexander | 6-2,6-1 |
| Challenger St. Tropez | 2023/09/17 12:25 | Enzo Wallart v Cozbinov, Alexander | 4-6,4-6 |
| ITF M25 Monastir | 2023/09/13 10:20 | Cozbinov, Alexander v Daniel Khazime | 4-6,3-6 |
| ITF M25 Monastir | 2023/09/08 08:30 | Ryan Seggerman v Cozbinov, Alexander | 7-6,7-6 |
| ITF M15 Ithaca | 2023/10/04 14:00 | Mitsui, Shunsuke v Gregg, Perry | 3-6,6-7 |
| ITF M15 Champaign | 2023/09/16 15:00 | Liam Draxl v Mitsui, Shunsuke | 6-2,6-2 |
| ITF M15 Champaign | 2023/09/15 15:00 | Mitsui, Shunsuke v Jack Loutit | 7-6,6-2 |
| ITF M15 Champaign | 2023/09/14 15:00 | Mitsui, Shunsuke v Adit Sinha | 6-4,3-6,7-5 |
| ITF M15 Champaign | 2023/09/13 19:35 | Mitsui, Shunsuke v Karlis Ozolins | 6-4,6-2 |
| UTR Pro Knoxville | 2023/09/02 00:27 | Jose Garcia v Mitsui, Shunsuke | 7-6,6-2 |
| UTR Pro Knoxville | 2023/08/31 18:00 | Mitsui, Shunsuke v Tommy Czaplinski | 6-4,6-2 |
| UTR Pro Knoxville | 2023/08/29 19:46 | Mitsui, Shunsuke v Michael Zhu | 6-1,6-4 |