| ITF M25 Trier | 2021/08/25 09:00 | Marvin Moeller v Leopold Zima | 6-1,7-5 |
| ITF M25 Trier | 2021/08/23 15:05 | Leopold Zima v Benito Sanchez Martinez | 6-1,7-5 |
| ITF M25 Trier | 2021/08/23 10:30 | Leopold Zima v Lennart Melzer | 6-1,6-1 |
| ITF M25 Ueberlingen | 2021/08/19 12:30 | Ergi Kirkin v Leopold Zima | 5-7,6-0,6-3 |
| ITF M25 Ueberlingen | 2021/08/18 12:55 | Leopold Zima v Martin Benes | 6-2,6-1 |
| ITF M25 Frankfurt am Main | 2021/08/09 08:50 | Dominik Fritsche v Leopold Zima | 6-3,7-5 |
| ITF M25 Klosters | 2021/06/21 07:00 | Luca Castelnuovo v Leopold Zima | 6-2,3-6,10-6 |
| ITF M25 Klosters | 2021/06/20 07:00 | Moritz Trocker v Leopold Zima | 2-6,2-6 |
| ITF M15 Marbella | 2021/05/24 08:00 | Diego F Flores v Jim Walder | 6-4,7-5 |
| ITF M15 Marbella | 2021/05/23 08:00 | Jim Walder v Lluc Mir Anglada | 6-3,7-5 |
| ITF M15 Troisdorf | 2021/05/09 10:00 | Jim Walder v Tim Riedel | 5-7,1-6 |
| ITF M25 Meerbusch | 2021/04/12 12:00 | Jim Walder v Paul Woerner | 3-6,5-7 |
| ITF M25 Meerbusch | 2021/04/12 07:30 | Jimmy Yang v Jim Walder | 2-6,3-6 |
| ITF M15 Antalya | 2021/03/14 07:00 | Jim Walder v Ivan Zaytsev | 4-6,2-6 |
| ITF M15 Antalya | 2021/03/07 07:00 | Jim Walder v Federico Campana | 6-1,2-6,13-15 |
| ITF M15 Antalya | 2021/02/28 11:00 | Radu Mihai Papoe v Jim Walder | 6-2,6-4 |