Stadium: Clay 8 Round: 62 Ground: Hardcourt outdoor
| ITF Turkey F30 | 2018/09/30 07:30 | Oleg Besednikov v Niklas Guttau | 5-7,0-6 |
| ITF Turkey F30 | 2018/09/29 07:00 | Niklas Guttau v Neil Oberleitner | 6-3,6-4 |
| ITF Netherlands F5 | 2018/08/19 10:00 | Niklas Guttau v Esteban Bruna | 3-6,4-6 |
| ITF Netherlands F4 | 2018/08/11 09:00 | Alban Meuffels v Niklas Guttau | 6-3,6-4 |
| ITF Poland F6 | 2018/08/07 11:25 | Adrian Andrzejczuk v Niklas Guttau | 6-2,6-1 |
| ITF Poland F6 Qual | 2018/08/06 08:00 | Niklas Guttau v Krzysztof Mlazga | 6-2,6-4 |
| ITF Poland F6 Qual | 2018/08/05 09:30 | Niklas Guttau v Michele Lorenzo Iftimie | 5-7,6-2,6-3 |
| ATP Hamburg Qual | 2018/07/21 12:45 | Jozef Kovalík v Niklas Guttau | 6-0,6-1 |
| ITF Turkey F30 | 2018/09/30 09:30 | Igor Panin v Vincentiu A Niculescu | 1-6,1-6 |
| ITF Turkey F30 | 2018/09/29 07:00 | Vincentiu A Niculescu v Floris Podzimek | 6-4,6-2 |
| ITF Romania F13 | 2018/09/09 10:00 | Lucas Gerch v Vincentiu A Niculescu | 6-4,6-2 |
| ITF Romania F12 | 2018/09/02 07:00 | Alexandru Vasile Manole v Vincentiu A Niculescu | 4-6,6-1,6-1 |
| ITF Romania F11 | 2018/08/26 13:00 | Mihai Razvan Marinescu v Vincentiu A Niculescu | 6-2,7-5 |
| ITF Romania F10 | 2018/08/20 07:00 | Imanol L Morillo v Vincentiu A Niculescu | 3-6,6-3,6-0 |
| ITF Romania F9 | 2018/08/12 08:30 | Vladislav Melnic v Vincentiu A Niculescu | 6-4,6-3 |
| ITF Romania F8 | 2018/08/05 11:30 | Mircea-Alexandru Jecan v Vincentiu A Niculescu | 6-2,6-1 |