Stadium: Indoor 3 Round: 62 Ground: Clay
| ITF M15 - Meerbusch | 2023/04/24 08:00 | Leopold Zima v Ruben Hartig | 6-4,6-1 |
| ITF M15 - Telde | 2023/04/13 12:05 | Leopold Zima v Vilius Gaubas | 2-6,1-6 |
| ITF M15 - Telde | 2023/04/11 11:05 | Tomas C Abasolo v Leopold Zima | 4-6,3-6 |
| ITF M25 - Reus | 2023/04/02 07:30 | Leopold Zima v Anthony Genov | 2-6,4-6 |
| ITF M15 - Antalya | 2023/03/22 07:00 | Gilles Arnaud Bailly v Leopold Zima | 6-3,6-0 |
| ITF M15 - Antalya | 2023/03/15 09:30 | Joel Schwaerzler v Leopold Zima | 6-2,6-2 |
| ITF M15 - Antalya | 2023/03/14 10:00 | Leopold Zima v Berk Ilkel | 6-2,6-2 |
| ITF M15 - Antalya | 2023/03/13 15:05 | Leopold Zima v Yuquan Jin | 6-2,6-1 |
| ITF M15 - Heraklion | 2023/03/19 07:00 | Niklas Koch v Raz Katz | 2-6,6-7 |
| ITF M25 - Heraklion | 2023/03/13 08:00 | Nikolay Nedelchev v Niklas Koch | 6-1,6-1 |
| ITF M25 - Nussloch | 2023/01/23 09:00 | Niklas Koch v Jannik Opitz | 3-6,4-6 |
| ITF M15 - Trier | 2022/08/22 08:00 | Joshua Schaefer v Niklas Koch | 5-7,4-6 |
| UTR Pro Tennis Series - Blaricum | 2022/04/05 12:30 | Zachary Eisinga v Niklas Koch | 5-1 |
| UTR Pro Tennis Series - Blaricum | 2022/04/04 13:30 | Twan Van Zijl v Niklas Koch | 6-1,6-1 |
| UTR Pro Tennis Series - Amsterdam | 2022/03/05 12:00 | Olivier Rojas v Niklas Koch | 3-6,6-1,5-4 |
| UTR Pro Tennis Series - Amsterdam | 2022/03/04 09:00 | Jurriaan Bol v Niklas Koch | 6-4,1-6,6-3 |