Stadium: Court 2 Round: 25
| ITF Poland F11 | 2017/08/27 08:00 | Konrad Mularczyk v Mateusz Kowalczyk | 2-6,2-6 |
| ITF Poland F8 | 2017/08/01 13:55 | Adrian Andrzejczuk v Mateusz Kowalczyk | 6-2,6-3 |
| ITF Poland F8 Qual | 2017/08/01 07:30 | Ivan Marrero Curbelo v Mateusz Kowalczyk | 6-7,1-6 |
| ITF Poland F8 Qual | 2017/07/29 08:00 | Davide Innocenti v Mateusz Kowalczyk | 4-6,4-6 |
| ITF Italy F7 | 2017/04/03 11:45 | Mateusz Kowalczyk v Gianluca Mager | 4-6,3-6 |
| ITF Italy F7 Qual | 2017/04/02 07:30 | Javier Barranco Cosano v Mateusz Kowalczyk | 3-6,4-6 |
| ITF Italy F7 Qual | 2017/04/01 07:30 | Mateusz Kowalczyk v Alexandru Catalin Marasin | 6-0,7-5 |
| Challenger Brescia Qual | 2016/11/12 10:55 | Mateusz Kowalczyk v Laurynas Grigelis | 6-7,2-6 |
| ITF Poland F10 | 2017/08/22 09:55 | Michal Dembek v Kristian Lozan | 6-2,6-2 |
| ITF Russia F7 | 2017/08/18 08:30 | Artur Shakhnubaryan v Kristian Lozan | 6-3,7-5 |
| ITF Russia F7 | 2017/08/17 07:00 | Kristian Lozan v Yan Sabanin | 6-2,6-3 |
| ITF Russia F7 | 2017/08/16 10:40 | Kristian Lozan v Alexey Nesterov | 7-6,3-6,6-2 |
| ITF Russia F6 | 2017/08/11 09:30 | Artur Shakhnubaryan v Kristian Lozan | 6-3,7-6 |
| ITF Russia F6 | 2017/08/10 07:00 | Kristian Lozan v Ilya Vasilyev | 6-3,6-4 |
| ITF Russia F6 | 2017/08/09 07:00 | Kristian Lozan v Kirill Kivattsev | 6-2,6-4 |
| ITF Poland F8 | 2017/08/02 11:40 | Kristian Lozan v Billy Harris | 3-6,3-6 |