Stadium: Court 9 Round: 27 Ground: Clay
| ITF M15 Cairo | 2021/09/02 08:30 | Fellin, Manfred v Giovanni Calvano | 7-5,6-4 |
| ITF M15 Cairo | 2021/09/01 12:15 | Fellin, Manfred v Andrei Cuceu | 6-2,7-5 |
| 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 | 2021/09/02 08:30 | Bachmaier, Philip v Tanuma, Ryota | 6-2,3-6,6-7 |
| ITF M15 Cairo | 2021/09/01 09:50 | Akram El Sallaly v Tanuma, Ryota | 2-6,2-6 |
| ITF - M15 Monastir | 2021/07/01 13:00 | Tomas Farjat v Tanuma, Ryota | 6-3,6-1 |
| ITF - M15 Monastir | 2021/06/29 08:30 | Benjamin Winter Lopez v Tanuma, Ryota | 0-6,6-4,3-6 |
| ITF - M15 Monastir | 2021/06/22 08:30 | Alejo Lorenzo Lingua Lavallen v Tanuma, Ryota | 6-1,6-4 |
| ITF - M15 Monastir | 2021/06/16 11:50 | Tanuma, Ryota v Santiago Rodriguez Taverna | 6-3,3-6,3-6 |
| ITF - M15 Monastir | 2021/06/10 10:30 | Guy Orly Iradukunda v Tanuma, Ryota | 2-6,6-4,6-2 |
| ITF - M15 Monastir | 2021/06/01 08:50 | Taisei Ichikawa v Tanuma, Ryota | 7-6,6-3 |