Stadium: Court 2 Round: 25 Ground: Hardcourt indoor
| ITF M15 Huy | 2021/08/26 14:10 | Deney Wassermann v Marvin Netuschil | 6-3,6-2 |
| ITF M15 Huy | 2021/08/25 12:50 | Zachary Eisinga v Marvin Netuschil | 4-6,6-7 |
| ITF M15 Oldenzaal | 2021/08/18 08:00 | Marvin Netuschil v Mark Whitehouse | 4-6,3-6 |
| ITF M25 Marburg | 2021/07/08 11:25 | Jonathan Mridha v Marvin Netuschil | 6-4,7-6 |
| ITF M25 Marburg | 2021/07/07 11:50 | Marvin Netuschil v Alejandro Gonzalez | 6-7,6-4,6-1 |
| ITF M25 The Hague | 2021/06/27 08:00 | Marvin Netuschil v Alec Deckers | 6-4,6-2 |
| ITF M15 Bergamo | 2021/06/25 10:00 | Federico Arnaboldi v Marvin Netuschil | 7-6,6-4 |
| ITF M15 Bergamo | 2021/06/24 08:00 | Marvin Netuschil v Daniele Capecchi | 6-1,6-0 |
| ITF M25 Caslano | 2021/08/26 08:30 | Leandro Riedi v Mateus Alves | 4-6,4-6 |
| ITF M25 Caslano | 2021/08/25 08:30 | Leandro Riedi v Petro Orlando Fellin | 7-6,6-2 |
| ATP Kitzbuhel | 2021/07/24 12:50 | Jozef Kovalik v Leandro Riedi | 6-2,6-4 |
| ATP Gstaad | 2021/07/20 13:00 | Federico Delbonis v Leandro Riedi | 6-3,6-3 |
| ITF M25 Bourg-en-Bresse | 2021/07/01 08:30 | Jurgen Briand v Leandro Riedi | 6-4,6-4 |
| ITF M25 Bourg-en-Bresse | 2021/06/30 10:25 | Leandro Riedi v Stefano Napolitano | 6-4,4-6,6-0 |
| ITF M25 Klosters | 2021/06/24 06:50 | Leandro Riedi v Henry V-D Schulenburg | 4-6,2-6 |
| ITF M25 Klosters | 2021/06/23 07:00 | Alex Rybakov v Leandro Riedi | 6-3,6-7,2-6 |