Stadium: Court 1 Round: 26 Ground: Clay
| ITF - M25 Ueberlingen | 2021/08/18 09:30 | Niklas Schell v Florian Broska | 3-6,6-3,6-3 |
| ITF - M25 Frankfurt nad Mohanom | 2021/08/10 10:30 | Taiyo Yamanaka v Niklas Schell | 6-1,6-2 |
| ITF - M25 Frankfurt nad Mohanom | 2021/08/09 11:55 | Max Wiskandt v Niklas Schell | 6-3,3-6,5-10 |
| ITF - M25 Marburg | 2021/07/07 13:00 | Louis Wessels v Niklas Schell | 6-3,6-4 |
| ITF - M25 Klosters | 2021/06/20 08:55 | Ilias Zimmermann v Niklas Schell | 6-4,4-6,12-10 |
| ITF - M15 - Antalya | 2021/05/23 07:00 | Niklas Schell v Stefano D'Agostino | 4-6,6-3,7-10 |
| ITF - M15 Troisdorf | 2021/05/09 08:00 | Marlon Vankan v Niklas Schell | 2-6,7-6,13-11 |
| ITF - M15 Monastir | 2021/04/18 13:00 | Lilian Breut v Niklas Schell | 6-2,6-3 |
| ITF - M25 Ueberlingen | 2021/08/18 12:30 | Hendrik Jebens v Eduard Esteve Lobato | 6-7,3-6 |
| ITF - M25 Frankfurt nad Mohanom | 2021/08/15 10:00 | Yshai Oliel v Eduard Esteve Lobato | 6-7,2-6 |
| ITF - M25 Frankfurt nad Mohanom | 2021/08/14 09:00 | Oriol Roca Batalla v Eduard Esteve Lobato | 6-3,1-6,5-7 |
| ITF - M25 Frankfurt nad Mohanom | 2021/08/13 11:45 | Eduard Esteve Lobato v Daniel Cukierman | 6-3,6-2 |
| ITF - M25 Frankfurt nad Mohanom | 2021/08/12 08:50 | Eduard Esteve Lobato v Alejandro Gomez | 6-3,6-4 |
| ITF - M25 Frankfurt nad Mohanom | 2021/08/11 09:00 | Eduard Esteve Lobato v Benito Sanchez Martinez | 6-2,6-3 |
| ITF - M25 Denia | 2021/07/31 16:00 | Eduard Esteve Lobato v Nick Hardt | 6-7,3-6 |
| ITF - M25 Denia | 2021/07/30 16:00 | Javier Barranco Cosano v Eduard Esteve Lobato | 1-6,6-3,3-6 |