Round: 54 Ground: Clay
| ITF Germany F8 Qual | 2018/07/15 12:30 | Marcel Marlon Sudzum v Niklas Guttau | 4-6,0-6 |
| ITF Germany F8 Qual | 2018/07/15 08:30 | Marcel Marlon Sudzum v Oscar Moraing | 6-2,6-4 |
| ITF Germany F7 | 2018/07/08 08:00 | Marcel Marlon Sudzum v Nicolas Zaidman | 4-6,0-6 |
| ITF Belgium F3 Qual | 2018/06/30 07:30 | Marcel Marlon Sudzum v Arnaud Destrebecq | 2-6,2-6 |
| ITF Belgium F2 Qual | 2018/06/24 11:00 | Alex Knaff v Marcel Marlon Sudzum | 6-1,2-6,6-4 |
| ITF Belgium F2 Qual | 2018/06/23 15:25 | Marcel Marlon Sudzum v Ian O'Jon | 6-2,6-4 |
| ITF Czech Republic F2 | 2018/05/23 11:40 | Marcel Marlon Sudzum v Robin Stanek | 2-6,5-7 |
| ITF Czech Republic F2 Qual | 2018/05/21 11:30 | Yvo Panak v Marcel Marlon Sudzum | 3-6,4-6 |