Stadium: Center Court Round: 26 Ground: Clay
| ITF Belgium F8 Qual | 2017/08/06 08:00 | Raphael Calzi v Alex Knaff | 2-6,0-6 |
| ITF Germany F6 | 2016/07/03 08:00 | Raphael Calzi v Alex Knaff | 6-4,6-3 |
| ITF M25 Arlon | 2023/06/28 12:35 | Louis Van Herck v Raphael Calzi | 6-2,2-6,1-6 |
| ITF M25 Arlon | 2023/06/27 08:00 | Antoine Vincent v Raphael Calzi | 7-6,2-6,2-10 |
| ITF M25 Arlon | 2023/06/26 08:00 | Can Ayral v Raphael Calzi | 3-6,2-6 |
| ITF M15 Saarlouis | 2023/06/18 13:30 | Jim Hendrikx v Raphael Calzi | 6-3,6-3 |
| ITF M25 Martos | 2023/06/13 07:30 | Goncalo Falcao v Raphael Calzi | 6-2,4-6,12-10 |
| ITF M25 Martos | 2023/06/12 13:30 | Jordi Domenech Castillo v Raphael Calzi | 4-6,4-6 |
| ITF M25 Sabadell | 2023/05/02 07:55 | Raphael Calzi v Noah Lopez | 6-4,3-6,8-10 |
| ITF M25 Sabadell | 2023/05/01 08:00 | Bruno P Navarro v Raphael Calzi | 6-2,5-7,3-10 |
| ITF M25 Arlon | 2023/06/28 10:35 | Alex Knaff v Mathys Erhard | 7-6,6-4 |
| ITF M15 Saarlouis | 2023/06/22 12:30 | Sander Jong v Alex Knaff | 6-4,6-3 |
| ITF M15 Saarlouis | 2023/06/21 11:20 | Masato Perera v Alex Knaff | 2-6,3-6 |
| ITF M15 Duffel | 2023/06/13 10:00 | Alex Knaff v Michiel de Krom | 6-7,3-6 |
| ITF M15 Pazardzhik | 2023/05/26 07:00 | Leonardo Rossi v Alex Knaff | 6-1,6-3 |
| ITF M15 Pazardzhik | 2023/05/25 07:00 | Marco Miceli v Alex Knaff | 6-2,1-6,3-6 |
| ITF M15 Pazardzhik | 2023/05/20 09:45 | Alex Knaff v Iliyan Radulov | 4-6,2-6 |
| ITF M15 Pazardzhik | 2023/05/19 11:20 | Alex Knaff v Nicolas Buitrago | 4-6,6-3,6-2 |