Stadium: Court 5 Round: 62 Ground: Clay
| ITF M15 Antalya | 2021/03/03 06:50 | Miljan Zekic v Marvin Netuschil | 6-0,6-3 |
| ITF M15 Antalya | 2021/02/07 06:00 | Marvin Netuschil v Sandro Kopp | 5-7,4-6 |
| ITF M15 Antalya | 2021/01/31 06:30 | Marvin Netuschil v Gabriel Donev | 4-6,6-7 |
| ITF M25 Hamburg | 2020/10/20 10:00 | Marvin Netuschil v Camilo Ugo Carabelli | 2-6,2-6 |
| ITF M25 Hamburg | 2020/10/19 11:00 | Marvin Netuschil v Yan Sabanin | 7-6,6-2 |
| German Masters | 2020/08/28 16:40 | Marvin Netuschil v Neal Lasowski | 6-1,6-1 |
| German Premier League | 2020/08/27 14:05 | Arthur De Greef v Marvin Netuschil | 3-6,0-6 |
| German Premier League | 2020/08/26 08:05 | Marvin Netuschil v Henri Squire | 6-3,4-6,5-7 |
| ITF M15 Monastir | 2021/03/15 12:30 | Kai Lemstra v Alexander Kotzen | 1-6,3-6 |
| ITF M15 Monastir | 2021/03/15 08:00 | Kai Lemstra v John Sperle | 6-3,6-3 |
| ITF M15 Monastir | 2021/03/14 08:00 | Guy Orly Iradukunda v Kai Lemstra | 3-6,5-7 |
| ITF M15 Monastir | 2021/03/11 10:40 | Kai Lemstra v Juan Bautista Torres | 4-6,1-6 |
| ITF M15 Monastir | 2021/03/10 12:15 | Kai Lemstra v Christoph Negritu | 6-4,2-6,6-1 |
| ITF M15 Monastir | 2021/03/08 18:00 | Anis Ghorbel v Kai Lemstra | 6-3,6-4 |
| ITF M15 Monastir | 2021/03/08 13:30 | Sabit Suntic v Kai Lemstra | 3-6,6-4,8-10 |
| ITF M15 Monastir | 2021/03/07 10:30 | Facundo Yunis v Kai Lemstra | 6-7,3-6 |