Stadium: Wisla Centrum 2 Round: 25 Ground: Clay
| ITF Germany F16 | 2015/10/11 11:00 | David Poljak v Luca Gelhardt | 6-4,7-6 |
| Challenger Ostrava Qual | 2018/04/28 10:05 | David Poljak v Patricio Heras | 3-6,3-6 |
| ITF Egypt F14 | 2018/04/22 08:00 | Alessandro Bega v David Poljak | 6-4,6-3 |
| ITF Egypt F14 | 2018/04/21 08:00 | David Poljak v Evan Hoyt | 6-4,6-4 |
| ITF Egypt F14 | 2018/04/20 08:00 | David Poljak v Dusty H. Boyer | 6-3,6-4 |
| ITF Egypt F14 | 2018/04/19 09:50 | David Poljak v Frederik Press | 6-2,6-4 |
| ITF Egypt F14 | 2018/04/18 09:45 | David Poljak v Daniel Echeverry | 6-0,6-2 |
| ITF Egypt F13 | 2018/04/12 08:00 | David Poljak v Andres Artunedo Martinavarr | 6-4,2-6,4-6 |
| ITF Egypt F13 | 2018/04/11 08:00 | David Poljak v Romain Bauvy | 6-4,6-4 |
| ITF Poland F1 | 2018/05/03 09:00 | Luca Gelhardt v Pascal Meis | 3-6,3-6 |
| ITF Poland F1 | 2018/05/01 09:45 | Maciej Smola v Luca Gelhardt | 6-4,4-6,0-6 |
| Challenger Lille Qual | 2018/03/17 17:45 | Gabor Borsos v Luca Gelhardt | 6-4,6-0 |
| ITF Greece F2 | 2018/03/05 07:30 | Luca Gelhardt v Corrado Summaria | 4-6,3-6 |
| ITF Greece F2 | 2018/03/04 08:00 | Luca Gelhardt v Michalis Sakellaridis | 6-1,7-5 |
| ITF Greece F2 | 2018/03/03 07:30 | Luca Gelhardt v Aria Harajchi | 6-3,6-3 |
| ITF Greece F1 | 2018/02/27 08:00 | Ioannis Stergiou v Luca Gelhardt | 6-3,6-4 |
| ITF Tunisia F4 | 2018/01/30 13:10 | Luca Gelhardt v Tadeas Paroulek | 2-6,2-6 |