Stadium: Court 6 Round: 44 Ground: Clay
| ITF Germany F4 | 2018/06/16 08:00 | Marek Flinner v Jonathan Van Nieuwenhove | 6-7,4-6 |
| ITF Czech Republic F1 | 2018/05/13 10:00 | Dragos Dima v Marek Flinner | 6-3,6-2 |
| ITF Czech Republic F1 | 2018/05/12 09:00 | Marek Flinner v Benedict Moerl | 7-5,7-6 |
| ITF Italy F8 Qual | 2018/04/15 12:00 | Marek Flinner v Andrea Guerrieri | 2-6,0-6 |
| ITF Italy F8 Qual | 2018/04/14 13:00 | Marek Flinner v Federico Juan Aguilar | 7-5,7-6 |
| ITF Egypt F13 | 2018/04/07 10:30 | Yannick Lenaerts v Marek Flinner | 6-4,3-6,6-4 |
| ITF Egypt F12 | 2018/04/01 08:00 | Marek Flinner v Saida'lo Saidkarimov | 7-5,5-7,0-6 |
| ITF Egypt F12 | 2018/03/31 10:30 | Killian Davanzo v Marek Flinner | 6-7,2-6 |
| ITF Germany F8 Qual | 2018/07/15 14:00 | Karlo Cubelic v Marcus Mansson | 6-2,7-6 |
| ITF Germany F8 Qual | 2018/07/15 10:00 | Felix Andre v Karlo Cubelic | 2-6,1-6 |
| ITF Netherlands F3 | 2018/07/08 09:30 | Arklon H D Pino v Karlo Cubelic | 6-1,7-5 |
| ITF Netherlands F3 | 2018/07/07 12:15 | Karlo Cubelic v Daniel Grunberger | 3-6,6-3,6-3 |
| ITF Netherlands F3 | 2018/07/07 07:30 | Karlo Cubelic v Tom Clavel | 6-4,6-2 |
| ITF Germany F5 | 2018/06/25 08:00 | David Chaplefeh Forchap v Karlo Cubelic | 1-6,4-6 |
| ITF Germany F5 | 2018/06/25 08:00 | Gabriel Donev v Karlo Cubelic | 6-2,6-2 |
| ITF Germany F5 | 2018/06/24 15:00 | Karlo Cubelic v Jordi Walder | 7-5,3-6,6-2 |