Stadium: Court 20 Round: 25 Ground: Clay
| ITF M15 Antalya | 2021/11/03 11:20 | Olaf Pieczkowski v Juan Pablo Paz | 4-6,3-6 |
| ITF M15 Lodz | 2021/08/18 11:25 | Wojciech Marek v Olaf Pieczkowski | 5-7,6-4,6-1 |
| ITF M15 Gdynia | 2021/08/11 15:40 | Pol Toledo Bague v Olaf Pieczkowski | 6-4,6-0 |
| ITF M15 Gdynia | 2021/08/10 08:00 | Alexander Kotzen v Olaf Pieczkowski | 2-6,6-2,8-10 |
| ITF M15 Gdynia | 2021/08/09 08:00 | Olaf Pieczkowski v Millen Hurrion | 6-1,6-7,10-4 |
| ITF M15 Gdynia | 2021/08/08 08:00 | Olaf Pieczkowski v Dominik Langmajer | 6-2,6-1 |
| ITF M25 Wroclaw | 2021/06/28 09:30 | Alibek Kachmazov v Olaf Pieczkowski | 6-0,6-1 |
| ITF M25 Wroclaw | 2021/06/27 11:00 | Tomas Lanik v Olaf Pieczkowski | 2-6,3-6 |
| ITF M15 Antalya | 2021/11/05 07:00 | Lukas Neumayer v Juan Pablo Paz | 2-6,6-3,0-6 |
| ITF M15 Antalya | 2021/11/04 06:30 | Nicolae Frunza v Lukas Neumayer | 3-6,3-6 |
| ITF M15 Antalya | 2021/11/03 12:35 | Luka Todorovic v Lukas Neumayer | 2-6,6-7 |
| ITF M15 Antalya | 2021/10/29 07:00 | Calin Manda v Lukas Neumayer | 4-6,6-3,7-6 |
| ITF M15 Antalya | 2021/10/28 06:50 | Marsel Ilhan v Lukas Neumayer | 2-6,6-7 |
| ITF M15 Antalya | 2021/10/27 09:45 | Lukas Neumayer v Nicholas David Ionel | 7-6,7-6 |
| ITF M25 Toulouse | 2021/10/22 12:45 | Joris De Loore v Lukas Neumayer | 6-4,6-4 |
| ITF M25 Toulouse | 2021/10/21 14:55 | Lukas Neumayer v Antoine Escoffier | 4-6,6-4,6-3 |