Stadium: Court 1 Round: 44 Ground: Clay
| ITF M25 Poznan | 2021/08/22 08:00 | Marcel Politowicz v Timur Mukhtarulin | 7-5,6-4 |
| ITF M25 Grodzisk Mazowiecki | 2021/08/01 13:50 | Marcel Politowicz v Alan Bojarski | 4-6,7-5,2-10 |
| Challenger Poznan | 2021/07/25 09:00 | Evan Furness v Marcel Politowicz | 6-1,6-3 |
| ITF M25 Wroclaw | 2021/06/27 11:00 | Davide Tortora v Marcel Politowicz | 6-2,4-6,10-8 |
| ITF M25 Poznan | 2019/08/21 12:45 | Marcel Politowicz v Camilo Ugo Carabelli | 1-6,0-6 |
| ITF Poland F8 | 2018/08/21 13:00 | Petr Nouza v Marcel Politowicz | 6-3,6-4 |
| ITF M15 Oldenzaal | 2021/08/16 10:00 | Adrian Oetzbach v Karlo Cubelic | 5-7,7-5,3-10 |
| ITF M15 Oldenzaal | 2021/08/15 10:15 | Adrian Oetzbach v Mark Simons | 6-1,6-2 |
| ITF M25 Frankfurt am Main | 2021/08/11 11:15 | Adrian Oetzbach v Taiyo Yamanaka | 5-7,5-7 |
| ITF M25 Frankfurt am Main | 2021/08/10 08:25 | Lenny Hampel v Adrian Oetzbach | 2-6,6-0,2-10 |
| ITF M25 Frankfurt am Main | 2021/08/09 09:00 | Adrian Oetzbach v Oscar Moraing | 6-4,3-6,10-6 |
| ITF M15 Frederiksberg | 2021/08/04 12:05 | Jonathan Mridha v Adrian Oetzbach | 6-2,6-3 |
| ITF M15 Frederiksberg | 2021/08/02 10:20 | Adrian Oetzbach v Carl Emil Overbeck | 6-3,1-6,10-4 |
| ITF M15 Vejle | 2021/07/27 12:20 | Adrian Oetzbach v Vasil Kirkov | 7-5,3-6,3-6 |