Round: 62 Ground: Carpet indoor
| Challenger Poprad Tatry Qual | 2018/06/16 09:35 | Jan Satral v Marek Gengel | 6-1,6-1 |
| Challenger Prostejov Qual | 2018/06/03 13:50 | Pascal Brunner v Marek Gengel | 6-2,6-3 |
| ITF Czech Republic F2 | 2018/05/23 13:40 | Marek Gengel v Jan Mertl | 6-7,3-6 |
| Challenger Samarkand Qual | 2018/05/15 05:30 | Roman Safiullin v Marek Gengel | 6-2,3-6,6-3 |
| Challenger Samarkand Qual | 2018/05/13 05:00 | Marek Gengel v Luca Margaroli | 6-3,3-6,6-3 |
| Challenger Samarkand Qual | 2018/05/12 05:00 | Marek Gengel v Vladimir Polyakov | 6-1,6-1 |
| Challenger Karshi Qual | 2018/05/07 05:30 | Mukund Sasikumar v Marek Gengel | 6-2,6-4 |
| Challenger Karshi Qual | 2018/05/06 08:20 | Marek Gengel v Sidharth Rawat | 7-6,7-6 |
| ITF Germany F4 | 2018/06/18 10:00 | Yanik Kaelin v Patrick Zahraj | 3-6,3-6 |
| ITF Germany F4 | 2018/06/16 10:30 | Marco Neubau v Yanik Kaelin | 1-6,2-6 |
| ITF Portugal F6 Qual | 2018/03/25 09:00 | Yanik Kaelin v Jurgen Briand | 1-6,6-7 |
| ITF Portugal F6 Qual | 2018/03/24 13:00 | Joao Antonio v Yanik Kaelin | 1-6,3-6 |
| ITF Portugal F5 Qual | 2018/03/18 12:30 | Yanik Kaelin v Daniel Rodrigues | 4-6,2-6 |
| ITF Portugal F5 Qual | 2018/03/18 11:30 | Joao Velloso v Yanik Kaelin | 0-6,1-6 |
| ITF Portugal F3 | 2018/03/07 10:00 | Dusty H. Boyer v Yanik Kaelin | 6-3,6-4 |
| ITF Portugal F3 | 2018/03/05 13:00 | Hans Albert Schubert v Yanik Kaelin | 2-6,4-6 |