Stadium: Court 3 Round: 25 Ground: Clay
| Challenger Poznan | 2018/06/07 16:45 | Alexey Vatutin v Jeremy Jahn | 7-6,4-6,6-3 |
| Challenger Poznan | 2018/06/06 14:00 | Jeremy Jahn v Kamil Majchrzak | 6-3,2-6,6-0 |
| Challenger Poznan Qual | 2018/06/04 13:30 | Jeremy Jahn v Guillermo Olaso | 6-7,6-1,6-2 |
| Challenger Poznan Qual | 2018/06/04 08:00 | Bernabe Zapata Miralles v Jeremy Jahn | 4-6,6-3,0-6 |
| Challenger Poznan Qual | 2018/06/03 08:00 | Kacper Zuk v Jeremy Jahn | 3-6,4-6 |
| ATP Geneva Qual | 2018/05/20 10:50 | Jeremy Jahn v Lukas Rosol | 7-6,3-6,5-7 |
| ATP Geneva Qual | 2018/05/19 14:25 | Nino Serdarusic v Jeremy Jahn | 4-6,4-6 |
| Challenger Heilbronn Qual | 2018/05/14 10:00 | Benjamin Hassan v Jeremy Jahn | 6-2,2-6,6-4 |
| ITF Ukraine F3 | 2018/05/21 07:00 | Giorgio Ricca v Vitalii Shcherba | 6-3,6-1 |
| ITF Ukraine F2 | 2018/05/14 07:00 | Vitalii Shcherba v Oleg Dolgosheyev | 3-6,3-6 |
| ITF Ukraine F2 | 2018/05/13 07:00 | Vitalii Shcherba v Egor Matvievici | 6-4,6-1 |
| ITF Ukraine F1 | 2018/05/08 13:10 | Vitalii Shcherba v Dejan Katic | 7-5,3-6,6-7 |
| ITF Poland F1 | 2018/04/28 07:00 | Vitalii Shcherba v Ivan Yatsuk | 2-6,1-6 |
| ITF Turkey F16 | 2018/04/21 09:30 | Timur Kiyamov v Vitalii Shcherba | 6-0,6-2 |
| ITF Turkey F15 | 2018/04/14 09:30 | Vitalii Shcherba v Filip Bergevi | 1-6,2-6 |
| ITF Turkey F14 | 2018/04/07 09:30 | Karl Friberg v Vitalii Shcherba | 6-2,6-3 |