Stadium: Teremeer (4) Round: 26 Ground: Hardcourt outdoor
| ITF M15 Troisdorf | 2021/05/12 13:30 | Netuschil, Marvin v Amaury Raynel | 6-1,6-3 |
| ITF M15 LPD Gran Canaria | 2021/04/28 09:55 | Johan Nikles v Netuschil, Marvin | 6-3,6-2 |
| ITF M25 Meerbusch | 2021/04/14 10:30 | Erler, Alexander v Netuschil, Marvin | 6-3,6-2 |
| ITF M25 Meerbusch | 2021/04/13 11:30 | Netuschil, Marvin v Hermans, Mats | 6-4,6-1 |
| ITF M25 Meerbusch | 2021/04/12 13:00 | Netuschil, Marvin v Patric Prinoth | 6-1,6-1 |
| ITF M25 Meerbusch | 2021/04/12 09:30 | Netuschil, Marvin v Kai Lemstra | 6-2,6-3 |
| ITF - M15 Antalya | 2021/03/03 06:50 | Miljan Zekic v Netuschil, Marvin | 6-0,6-3 |
| ITF - M15 Antalya | 2021/02/07 06:00 | Netuschil, Marvin v Sandro Kopp | 5-7,4-6 |
| ITF M15 Troisdorf | 2021/05/11 11:00 | Dietel, Maximilian v Sebastian Fanselow | 0-6,1-6 |
| ITF M15 Majadahonda | 2021/05/06 10:40 | Matteo Martineau v Sebastian Fanselow | 6-1,7-6 |
| ITF M15 Majadahonda | 2021/05/05 09:00 | Ignacio B Alia v Sebastian Fanselow | 2-6,0-6 |
| ITF - M25 Angers | 2021/04/22 13:30 | Lopez San Martin, Alvaro v Sebastian Fanselow | 2-6,6-1,6-4 |
| ITF - M25 Angers | 2021/04/21 15:05 | Sebastian Fanselow v Nikolas Sanchez Izquierdo | 6-2,7-5 |
| ITF M25 La Nucia | 2021/03/19 14:05 | Sebastian Fanselow v Raul Brancaccio | 6-7,0-6 |
| ITF - M25 Vale Do Lobo | 2021/03/14 11:30 | Kaichi Uchida v Sebastian Fanselow | 5-7,7-6,7-6 |
| ITF - M25 Vale Do Lobo | 2021/03/13 13:20 | Sebastian Fanselow v Wang, Tak Khunn | 6-1,6-3 |