Stadium: LEXUS Court Round: 28 Ground: Clay
| ITF M15 Saarlouis | 2023/06/23 10:00 | Hazem Naw v Joao Fonseca | 6-7,5-7 |
| ITF M15 Saarlouis | 2023/06/22 10:15 | Joao Fonseca v Collin Altamirano | 6-2,6-3 |
| ITF M15 Saarlouis | 2023/06/20 16:00 | Joao Fonseca v Milan Welte | 7-5,7-5 |
| ITF M15 Duffel | 2023/06/16 09:00 | Joao Fonseca v Buvaysar Gadamauri | 7-6,2-6,4-6 |
| ITF M15 Duffel | 2023/06/15 13:35 | Marlon Vankan v Joao Fonseca | 4-6,4-6 |
| ITF M15 Duffel | 2023/06/14 08:00 | Dylan Dietrich v Joao Fonseca | 3-6,3-6 |
| ITF M15 Mogi das Cruzes | 2023/04/29 13:15 | Orlando Luz v Joao Fonseca | 7-5,6-2 |
| ITF M15 Mogi das Cruzes | 2023/04/28 15:50 | Rafael Tosetto v Joao Fonseca | 2-6,0-6 |
| ITF M15 Saarlouis | 2023/06/23 12:30 | Lodewijk Weststrate v Sander Jong | 3-6,7-5,2-6 |
| ITF M15 Saarlouis | 2023/06/22 12:30 | Sander Jong v Alex Knaff | 6-4,6-3 |
| ITF M15 Saarlouis | 2023/06/20 11:35 | Yannik Kelm v Sander Jong | 1-6,0-6 |
| ITF M15 Duffel | 2023/06/15 10:00 | Jeremy Jahn v Sander Jong | 7-6,6-4 |
| ITF M15 Duffel | 2023/06/13 10:00 | Tom Pisane v Sander Jong | 3-6,1-6 |
| ITF M15 Duffel | 2023/06/12 12:00 | Sander Jong v Antonio Massara | 6-2,6-2 |
| UTR Pro Hilversum | 2023/06/11 06:00 | Sander Jong v Gabriel Alejandro Hidalgo | 6-1,5-0 |
| UTR Pro Hilversum | 2023/06/10 07:30 | Sander Jong v Ivan Sergeyev | 6-2,6-0 |