Stadium: Court 9 Round: 54 Ground: Clay
| ITF M15 Vejle | 2021/07/27 17:20 | Leonardo Catani v Korsgaard, Henrik Heise | 3-6,3-6 |
| ITF M15 Vejle | 2021/07/26 14:40 | Yannik Steinegger v Leonardo Catani | 5-7,6-2,10-4 |
| ITF M15 Vejle | 2021/07/25 11:00 | Schiavetti, Pietro v Leonardo Catani | 2-6,0-6 |
| ITF M15 Perugia | 2021/07/18 11:30 | Leonardo Catani v Bertuccioli, Federico | 4-6,2-6 |
| ITF M15 Gaiba | 2021/06/07 09:30 | Julien De Cuyper v Leonardo Catani | 6-3,6-3 |
| ITF M15 Cairo | 2021/05/04 07:55 | Kawakami, Rimpei v Leonardo Catani | 7-5,6-0 |
| ITF M15 Cairo | 2021/05/03 12:30 | Leonardo Catani v Petrovic, Luka | 7-6,1-6,10-3 |
| ITF M15 Cairo | 2021/05/02 08:00 | Michael Bassem Sobhy v Leonardo Catani | 2-6,3-6 |
| ITF M15 Esch/Alzette | 2021/07/18 08:00 | Raphael Collignon v Sudzum, Marcel Marlon | 6-4,6-4 |
| ITF M25 Bourg-en-Bresse | 2021/06/27 12:30 | Sudzum, Marcel Marlon v Adan Freire Da Silva | 6-7,0-6 |
| ITF M25 Alkmaar | 2021/06/20 17:00 | Sudzum, Marcel Marlon v Sabanin, Yan | 1-6,2-6 |
| ITF - M25 Santa Margherita | 2019/09/23 12:00 | Schinas, Stephanos v Sudzum, Marcel Marlon | 4-6,5-7 |
| ITF - M25 Santa Margherita | 2019/09/17 12:00 | Sudzum, Marcel Marlon v Rieder, Horst | 0-6,0-6 |
| ITF - M25 Santa Margherita | 2019/09/16 12:00 | Schinas, Stephanos v Sudzum, Marcel Marlon | 2-6,7-5,8-10 |
| ITF - M25 Santa Margherita | 2019/09/10 13:35 | Rieder, Horst v Sudzum, Marcel Marlon | 2-6,6-2,10-5 |
| ITF - M25 Santa Margherita | 2019/09/09 12:00 | Sudzum, Marcel Marlon v Guardeno, Marc | 6-1,6-3 |