Stadium: Court 2 Round: 54 Ground: Hardcourt indoor
| ITF M15 Melilla | 2021/09/23 15:10 | Raffael Schaer v Ignacio Monzon | 5-7,6-3,2-6 |
| ITF M15 Melilla | 2021/09/21 08:00 | Federico Marchetti v Raffael Schaer | 4-6,3-6 |
| ITF M25 Sierre | 2021/08/29 08:30 | Daniel Valent v Raffael Schaer | 6-2,6-3 |
| ITF M25 Caslano | 2021/08/23 09:50 | Giovanni Oradini v Raffael Schaer | 4-6,7-5,10-8 |
| ITF M25 Muttenz | 2021/08/18 11:10 | Alejandro Gonzalez v Raffael Schaer | 6-1,7-5 |
| ITF M25 Muttenz | 2021/08/17 09:45 | Raffael Schaer v Pietro Schiavetti | 3-6,6-4,10-8 |
| ITF M15 Monastir | 2021/08/01 08:00 | Raffael Schaer v Tadas Tarasevicius | 4-6,0-6 |
| ITF M15 Monastir | 2021/07/26 09:00 | Raffael Schaer v Joshua Sheehy | 2-6,3-6 |
| UTR Pro Tennis Series - Kodaň | 2021/10/23 07:00 | Nikolaj Katic v Jose Antonio Rodriguez Rodriguez | 6-7,2-6 |
| UTR Pro Tennis Series - Kodaň | 2021/10/21 07:00 | Nikolaj Katic v Felipe Mikkelsen | 6-4,6-2 |
| UTR Pro Tennis Series - Kodaň | 2021/10/20 13:15 | Nikolaj Katic v Vilhelm Fridell | 5-7,6-4,1-6 |
| UTR Pro Tennis Series - Kodaň | 2021/10/19 11:30 | Nikolaj Katic v Yurii Dzhavakian | 4-6,4-6 |
| UTR Pro Tennis Series - Kodaň | 2021/10/18 11:30 | Nikolaj Katic v Henrik Heise Korsgaard | 1-6,6-3,6-4 |
| ITF M15 Dauhá | 2021/10/11 13:30 | Boris Butulija v Nikolaj Katic | 6-1,6-3 |
| ITF - M15 Doha - kvalifikace | 2021/10/10 15:45 | Theertha Shashank Macherla v Nikolaj Katic | 4-6,6-7 |
| ITF M15 Dauhá | 2021/10/04 12:00 | Nikolaj Katic v Tao Mu | 0-6,1-6 |