Stadium: Court 9 Round: 25 Ground: Clay
| ITF M25 Ueberlingen | 2021/08/17 14:50 | Ergi Kirkin v Fellin, Manfred | 1-6,6-0,6-2 |
| ITF M15 Parnu | 2021/08/04 06:50 | Fellin, Manfred v Roncalli, Simone | 0-6,0-6 |
| ITF M15 Parnu | 2021/08/02 08:00 | Fellin, Manfred v Oskar Stumpf | 6-1,6-1 |
| ITF M15 Cairo | 2021/07/29 08:00 | Quentin Folliot v Fellin, Manfred | 6-0,6-4 |
| ITF M15 Cairo | 2021/07/28 11:15 | Vlad Andrei Dancu v Fellin, Manfred | 4-6,5-7 |
| ITF M15 Cairo | 2021/07/27 12:39 | Fellin, Manfred v Lema, Nicolas Agustin | 7-6,7-5 |
| ITF M15 Cairo | 2021/07/27 10:30 | Fellin, Manfred v Lema, Nicolas Agustin | 7-6,7-5 |
| ITF M15 Cairo | 2021/07/26 08:00 | Fellin, Manfred v Sami Ben Abdennibi | 6-1,6-0 |
| ITF M15 Cairo | 2021/08/31 10:30 | Andrei Cuceu v Vescovi, Tommaso | 4-6,6-2,11-9 |
| ITF M15 Cairo | 2021/08/30 12:30 | Mahadevan, Arjun v Andrei Cuceu | 2-6,2-6 |
| ITF M25 Pitesti | 2021/08/01 10:00 | Jesse De Jager v Andrei Cuceu | 1-6,6-3,10-4 |
| ITF M15 Cairo | 2021/07/19 07:30 | Andrei Cuceu v Lautaro Agustin Falabella | 4-6,3-6 |
| ITF M15 Cairo | 2021/07/18 08:30 | Borai, Ahmed v Andrei Cuceu | 4-6,6-7 |