Stadium: Court 1 Round: 25 Ground: Carpet indoor
| ITF Czech Republic F7 | 2018/10/23 11:10 | Kai Lemstra v Piotr Grynkowski | 4-6,6-1,4-6 |
| ITF Czech Republic F7 | 2018/10/22 13:00 | Vrba, Daniel v Piotr Grynkowski | 6-4,4-6,3-6 |
| ITF Germany F15 | 2018/10/11 13:50 | Matsukevitch, Denis v Piotr Grynkowski | 6-4,6-2 |
| ITF Germany F15 | 2018/10/10 12:10 | von Hindte, Leonard v Piotr Grynkowski | 6-7,6-1,3-6 |
| ITF Germany F15 | 2018/10/08 08:00 | Piotr Grynkowski v Sollie, Thorsten | 7-5,7-5 |
| ITF Poland F8 | 2018/08/21 13:00 | Piotr Grynkowski v Jelle Sels | 3-6,2-6 |
| ITF Poland F8 | 2018/08/20 09:30 | Robert Strombachs v Piotr Grynkowski | 1-6,1-6 |
| ITF Poland F7 | 2018/08/14 14:50 | Piotr Grynkowski v Vladyslav Orlov | 5-7,0-6 |
| ITF Czech Republic F6 | 2018/07/14 09:00 | Mertl, Jan v Jirousek, Tomas | 6-3,6-4 |
| ITF Czech Republic F6 | 2018/07/13 09:00 | Mertl, Jan v Patrik Rikl | 6-2,4-6,7-6 |
| ITF Czech Republic F6 | 2018/07/12 09:00 | Marek Jaloviec v Mertl, Jan | 5-7,2-6 |
| ITF Czech Republic F6 | 2018/07/11 12:00 | Semjan, Marek v Mertl, Jan | 6-3,5-7,4-6 |
| ITF Czech Republic F6 | 2018/07/09 10:30 | Alex Molcan v Mertl, Jan | 2-6,4-6 |
| ITF Czech Republic F5 | 2018/07/05 08:30 | Patrik Rikl v Mertl, Jan | 7-6,6-4 |
| ITF Czech Republic F5 | 2018/07/04 09:35 | Mertl, Jan v Pavel Kotov | 7-6,6-3 |
| ITF Czech Republic F5 | 2018/07/03 09:30 | Stepanek, Antonin v Mertl, Jan | 6-3,1-6,2-6 |