Stadium: Center Court Round: 46
| Challenger Prostejov Qual | 2018/06/03 09:45 | Pavel Nejedly v Marc Sieber | 1-6,5-7 |
| ITF Hungary F2 | 2018/05/18 08:00 | Mate Valkusz v Marc Sieber | 6-1,6-1 |
| ITF Hungary F2 | 2018/05/17 14:55 | Emil Ruusuvuori v Marc Sieber | 2-6,3-6 |
| ITF Hungary F2 | 2018/05/16 10:10 | Gabor Borsos v Marc Sieber | 1-6,7-6,1-6 |
| ITF Hungary F2 | 2018/05/15 12:30 | David Szintai v Marc Sieber | 4-6,3-6 |
| ITF Hungary F1 | 2018/05/11 10:45 | Mate Valkusz v Marc Sieber | 6-2,6-2 |
| ITF Hungary F1 | 2018/05/10 11:05 | Kenneth Raisma v Marc Sieber | 4-6,6-0,5-7 |
| ITF Hungary F1 | 2018/05/09 09:00 | Franjo Raspudic v Marc Sieber | 2-6,2-6 |
| Challenger Prostejov Qual | 2018/06/03 10:00 | Peter Goldsteiner v Jan Satral | 3-6,2-6 |
| ITF Czech Republic F3 | 2018/05/31 09:30 | Pavel Nejedly v Jan Satral | 2-6,7-5,6-2 |
| ITF Czech Republic F3 | 2018/05/29 08:30 | Dominik Recek v Jan Satral | 1-6,4-6 |
| Challenger Mestre Qual | 2018/05/19 10:35 | Jan Satral v Edoardo Eremin | 6-7,4-6 |
| Challenger Lisbon Qual | 2018/05/14 12:00 | Joris De Loore v Jan Satral | 6-1,6-7,7-6 |
| Challenger Lisbon Qual | 2018/05/13 13:10 | Fabricio Neis v Jan Satral | 7-6,3-6,1-6 |
| Challenger Lisbon Qual | 2018/05/12 13:35 | Omar Giacalone v Jan Satral | 6-3,4-6,4-6 |
| Challenger Braga | 2018/05/08 13:40 | Jan Satral v Joao Domingues | 3-6,2-6 |