Stadium: Court 4 Round: 44 Ground: Clay
| ITF Poland F7 | 2018/08/12 08:00 | Mercier, Tyler v Kostin, Viktor | 7-6,2-6,3-6 |
| ITF Poland F7 | 2018/08/11 08:00 | Kostin, Viktor v Galus, Piotr | 6-3,7-5 |
| ITF Poland F5 | 2016/08/17 08:00 | Kostin, Viktor v Karim-Mohamed Maamoun | 4-6,1-6 |
| ITF Poland F5 Qual | 2016/08/16 08:00 | Piatek, Mateusz v Kostin, Viktor | 2-6,1-6 |
| ITF Poland F5 Qual | 2016/08/15 08:00 | Mlazga, Krzysztof v Kostin, Viktor | 3-6,1-6 |
| ITF Poland F4 Qual | 2015/08/30 07:30 | Vladyslav Orlov v Kostin, Viktor | 4-6,1-6 |
| ITF Poland F3 | 2015/08/25 15:00 | Kostin, Viktor v Michon, Axel | 3-6,1-6 |
| ITF Poland F2 | 2015/08/20 09:55 | Kostin, Viktor v Michon, Axel | 2-6,3-6 |
| ITF Poland F7 | 2018/08/12 08:00 | Mikula, Michal v Steinberger, Max | 6-4,6-2 |
| ITF Poland F7 | 2018/08/11 08:00 | Andrzejczak, Bartlomiej v Mikula, Michal | 4-6,1-6 |
| ITF Poland F6 | 2018/08/07 09:50 | Pawel Juszczak v Mikula, Michal | 6-2,6-1 |
| ITF Poland F4 | 2018/05/21 09:00 | Semjan, Marek v Mikula, Michal | 7-5,6-3 |
| ITF Poland F3 | 2018/05/15 07:30 | Netuschil, Marvin v Mikula, Michal | 6-1,7-5 |
| ITF Poland F3 Qual | 2018/05/14 07:30 | Mikula, Michal v Labna, Ramy | 7-6,6-3 |
| ITF Poland F3 | 2018/05/13 07:00 | Mikula, Michal v Vesanen, Ilari | 6-1,6-1 |
| ITF Poland F6 Qual | 2017/07/17 11:30 | Mikula, Michal v Nazaruk, Dominik | 7-5,4-6,4-6 |