Stadium: Court 2 Round: 45 Ground: Carpet indoor
| ITF Sweden F5 | 2018/10/04 12:00 | Niklas-Salminen, Patrick v David Poljak | 6-1,7-6 |
| ITF Sweden F5 | 2018/10/01 12:00 | Ollert, Lukas v David Poljak | 6-4,3-6,2-6 |
| Orleans, France, Qualifying | 2018/09/22 17:30 | David Poljak v Jankovits, Yannick | 3-6,4-6 |
| Istanbul, Turkey | 2018/09/10 07:30 | David Poljak v Wang, Tak Khunn | 6-4,6-7,3-6 |
| Istanbul, Turkey | 2018/09/09 10:10 | David Poljak v Khabibulin, Timur | 6-4,6-2 |
| Zhangjiagang, China | 2018/09/02 06:50 | Wu, Di v David Poljak | 6-3,6-4 |
| ITF Belarus F3 | 2018/08/24 07:00 | Vilardo, Francesco v David Poljak | 6-4,3-6,6-2 |
| ITF Belarus F3 | 2018/08/23 07:00 | Giorgio Ricca v David Poljak | 2-6,4-6 |
| Challenger Ortisei | 2018/10/07 09:30 | Lenz, Julian v Benjamin Hassan | 4-6,4-6 |
| Challenger Ortisei | 2018/10/06 12:05 | Lenz, Julian v Kern, Robin | 6-3,6-2 |
| Florence, Italy | 2018/09/29 08:00 | Lenz, Julian v Joao Menezes | 4-6,4-6 |
| Challenger Sibiu | 2018/09/17 09:30 | Jelle Sels v Lenz, Julian | 7-6,2-6,6-3 |
| Challenger Sibiu | 2018/09/16 10:35 | Haerteis, Johannes v Lenz, Julian | 4-6,4-6 |
| Challenger Sibiu | 2018/09/15 09:40 | Dina, George Iulian v Lenz, Julian | 1-6,2-6 |
| Challenger Szczecin | 2018/09/10 09:00 | Lenz, Julian v Satral, Jan | 2-6,3-6 |
| Challenger Szczecin | 2018/09/09 11:10 | Gonzalo Lama v Lenz, Julian | 4-6,6-7 |