Stadium: Center Court Round: 26 Ground: Clay
| Challenger Brasilia | 2023/11/23 15:15 | Joao Fonseca v Roman Andres Burruchaga | 6-4,4-6,4-6 |
| Challenger Brasilia | 2023/11/21 14:40 | Aleksandar Kovacevic v Joao Fonseca | 3-6,6-3,6-7 |
| ITF M15 Saarlouis | 2023/06/24 11:00 | Joao Fonseca v Sander Jong | 4-6,3-6 |
| 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 |
| Challenger Danderyd | 2023/11/17 11:00 | Radu Albot v Flavio Cobolli | 4-6,6-7 |
| Challenger Danderyd | 2023/11/15 12:30 | Radu Albot v Oleksii Krutykh | 6-4,6-2 |
| Challenger Danderyd | 2023/11/14 12:10 | Radu Albot v Francesco Passaro | 4-6,6-3,6-4 |
| Challenger Helsinki | 2023/11/10 13:35 | Stefano Travaglia v Radu Albot | 6-4,3-6,7-5 |
| Challenger Helsinki | 2023/11/09 12:55 | Radu Albot v Nuno Borges | 6-4,1-6,6-4 |
| Challenger Helsinki | 2023/11/07 15:20 | Radu Albot v Alibek Kachmazov | 6-2,6-1 |
| Challenger Bergamo | 2023/11/01 13:40 | Billy Harris v Radu Albot | 1-6,6-3,6-4 |
| Challenger Bergamo | 2023/10/31 09:00 | Gauthier Onclin v Radu Albot | 7-6,0-6,0-6 |