Stadium: Court 11 Round: 62 Ground: Clay
| ITF M15 Gdynia | 2021/08/09 08:00 | Alexander Kotzen v Piotr Pawlak | 6-2,6-0 |
| ITF M15 Parnu | 2021/08/05 10:30 | Ergi Kirkin v Alexander Kotzen | 7-6,6-4 |
| ITF M15 Parnu | 2021/08/04 09:05 | Julius Tverijonas v Alexander Kotzen | 6-3,5-7,2-6 |
| ITF M15 Vejle | 2021/07/30 08:00 | Ergi Kirkin v Alexander Kotzen | 6-2,6-3 |
| ITF M15 Vejle | 2021/07/27 09:15 | Marius Ruzgas v Alexander Kotzen | 2-6,6-4,3-6 |
| ITF M15 Esch/Alzette | 2021/07/22 13:10 | Tommaso Compagnucci v Alexander Kotzen | 6-2,6-0 |
| ITF M15 Esch/Alzette | 2021/07/21 10:55 | Alexander Kotzen v Louis Wessels | 2-6,6-3,6-4 |
| ITF M15 Esch/Alzette | 2021/07/20 11:00 | Benjamin Dhoe v Alexander Kotzen | 3-6,4-6 |
| 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 |
| Polish National Tour | 2020/07/15 10:55 | Olaf Pieczkowski v Daniel Michalski | 2-6,3-6 |