Stadium: Court 3 Round: 27
| ITF Serbia F4 | 2018/08/28 08:00 | Martins Podzus v Ondrej Krstev | 6-1,6-1 |
| ITF Serbia F3 | 2018/08/23 08:00 | Ondrej Krstev v Dejan Katic | 6-7,6-3,3-6 |
| ITF Serbia F3 | 2018/08/21 08:00 | Darko Bojanovic v Ondrej Krstev | 7-6,1-6,3-6 |
| ITF Slovakia F3 | 2018/08/07 11:55 | Antonio Massara v Ondrej Krstev | 6-3,6-2 |
| ITF Slovakia F2 | 2018/08/01 08:00 | Patrik Nema v Ondrej Krstev | 6-4,2-6,6-4 |
| ITF Germany F9 | 2018/07/24 12:20 | Marcelo Zormann v Ondrej Krstev | 6-4,6-1 |
| ITF Czech Republic F6 Qual | 2018/07/07 13:30 | Ondrej Krstev v Michael Gloeckler | 3-6,1-6 |
| ITF Germany F4 | 2018/06/16 08:00 | Ondrej Krstev v James Markiewicz | 6-1,6-2 |
| ITF Poland F6 | 2018/08/12 10:00 | Maciej Rajski v Szymon Walkow | 6-4,5-7,1-6 |
| ITF Poland F6 | 2018/08/11 12:00 | Szymon Walkow v Matias Franco Descotte | 6-7,6-3,6-4 |
| ITF Poland F6 | 2018/08/10 12:45 | Tyler Mercier v Szymon Walkow | 4-6,3-6 |
| ITF Poland F6 | 2018/08/09 10:00 | Szymon Walkow v Nikita Mashtakov | 2-6,6-3,6-2 |
| ITF Poland F6 | 2018/08/07 08:00 | Szymon Walkow v Piotr Grynkowski | 6-3,6-2 |
| Challenger Sopot Qual | 2018/07/29 12:20 | Szymon Walkow v Vladyslav Manafov | 3-6,2-6 |
| Challenger Sopot Qual | 2018/07/28 09:00 | Franco Agamenone v Szymon Walkow | 3-6,6-2,2-6 |
| ITF Czech Republic F3 | 2018/05/29 12:15 | Szymon Walkow v Mateusz Terczynski | 4-6,4-6 |