Stadium: Quadra 6 Round: 14 Ground: Clay
| ITF M25 Santa Margherita | 2023/10/03 08:00 | Giorgio Tabacco v Kilian Feldbausch | 2-6,6-4,4-6 |
| Challenger Braga | 2023/09/25 12:55 | Zsombor Piros v Kilian Feldbausch | 3-6,7-5,6-3 |
| ITF M25 Sion | 2023/09/01 15:50 | Remy Bertola v Kilian Feldbausch | 6-4,7-5 |
| ITF M25 Sion | 2023/08/31 12:00 | Noah Lopez v Kilian Feldbausch | 2-6,4-6 |
| ITF M25 Sion | 2023/08/29 12:30 | Kilian Feldbausch v Gianmarco Ferrari | 6-3,6-2 |
| ITF M15 Caslano | 2023/08/22 07:00 | Luigi Sorrentino v Kilian Feldbausch | 1-6,7-5,7-5 |
| ITF M25 Muttenz | 2023/08/16 11:25 | Kilian Feldbausch v Jeffrey Von Der Schulenburg | 5-7,4-6 |
| Challenger Meerbusch | 2023/08/10 11:35 | Kilian Feldbausch v Daniel Rincon | 2-6,1-6 |
| Challenger Campinas | 2023/10/02 13:00 | Daniel Dutra Da Silva v Paulo A S Dos Santos | 6-4,7-5 |
| Challenger Campinas | 2023/10/01 13:00 | Paulo A S Dos Santos v Gilbert S K Junior | 2-6,6-4,6-4 |
| ITF M15 Sao Paulo | 2023/08/21 14:00 | Paulo A S Dos Santos v Julian Cundom | 6-7,6-7 |
| ITF M15 Belem | 2023/08/17 17:00 | Paulo A S Dos Santos v Ignacio A B Otarola | 5-7,3-6 |
| ITF M15 Belem | 2023/08/16 17:00 | Julian Cundom v Paulo A S Dos Santos | 6-7,5-7 |
| ITF M25 Pitesti | 2023/08/01 09:30 | Paulo A S Dos Santos v Vlad Andrei Dancu | 4-6,6-7 |
| ITF M25 Bacau | 2023/07/27 08:00 | Paulo A S Dos Santos v Luca Giacomini | 0-6,2-6 |
| ITF M25 Bacau | 2023/07/25 11:25 | Corentin Denolly v Paulo A S Dos Santos | 6-7,6-0,5-7 |