| ITF Poland F7 | 2017/07/25 08:00 | Andrzejczuk, Adrian v David Jorda Sanchis | 1-6,3-6 |
| ITF Poland F6 | 2017/07/19 09:35 | Andrzejczuk, Adrian v van Beem, Colin | 6-2,1-6,1-6 |
| ITF Poland F6 | 2017/07/18 10:35 | Lipka, Dariusz v Andrzejczuk, Adrian | 2-6,2-6 |
| ITF Poland F5 | 2017/07/13 17:00 | Andrzejczuk, Adrian v Smola, Maciej | 3-6,6-7 |
| ITF Poland F5 | 2017/07/12 10:25 | Andrzejczuk, Adrian v Lombe, Harrison | 6-2,6-2 |
| ITF Poland F4 | 2017/07/04 10:00 | Andrzejczuk, Adrian v Ameal, Juan Ignacio | 3-6,1-6 |
| ITF Poland F3 | 2017/06/26 12:05 | Andrzejczuk, Adrian v Jan Choinski | 3-6,2-6 |
| ITF Poland F2 | 2017/06/19 09:00 | Andrzejczuk, Adrian v Gennaro, Dante | 3-6,6-4,6-7 |
| ITF Poland F8 Qual | 2017/08/01 07:30 | Ivan Marrero Curbelo v Kowalczyk, Mateusz | 6-7,1-6 |
| ITF Poland F8 Qual | 2017/07/29 08:00 | Innocenti, Davide v Kowalczyk, Mateusz | 4-6,4-6 |
| ITF Italy F7 | 2017/04/03 11:45 | Kowalczyk, Mateusz v Gianluca Mager | 4-6,3-6 |
| ITF Italy F7 Qual | 2017/04/02 07:30 | Javier Barranco Cosano v Kowalczyk, Mateusz | 3-6,4-6 |
| ITF Italy F7 Qual | 2017/04/01 07:30 | Kowalczyk, Mateusz v Marasin, Alexandru Catalin | 6-0,7-5 |
| Challenger Brescia Qual | 2016/11/12 10:55 | Kowalczyk, Mateusz v Grigelis, Laurynas | 6-7,2-6 |
| Challenger Szczecin | 2015/09/16 11:00 | Kowalczyk, Mateusz v Marco Cecchinato | 3-6,4-6 |
| ITF Czech Republic F4 | 2014/10/23 09:30 | Kapas, Andriej v Kowalczyk, Mateusz | 5-7,4-6 |