Stadium: Centre Court Round: 25 Ground: Clay
| ITF Croatia F3 | 2018/03/22 14:00 | Matteo Viola v Nik Razborsek | 7-6,6-3 |
| ITF Croatia F3 | 2018/03/21 10:30 | Tommaso Gabrieli v Nik Razborsek | 3-6,3-6 |
| ITF Croatia F2 | 2018/03/15 09:00 | Zdenek Kolar v Nik Razborsek | 6-7,4-6 |
| ITF Croatia F2 | 2018/03/14 10:35 | Sebastian Prechtel v Nik Razborsek | 1-6,6-4,4-6 |
| ITF Croatia F2 | 2018/03/12 11:00 | Nik Razborsek v Nicolo Crespi | 6-1,6-0 |
| ITF Croatia F2 | 2018/03/11 08:00 | Nik Razborsek v Matteo Fortini | 6-1,6-2 |
| ITF Croatia F1 | 2018/03/09 09:00 | Pavel Nejedly v Nik Razborsek | 7-5,6-2 |
| ITF Croatia F1 | 2018/03/08 11:30 | Nik Razborsek v Gabriel Schmidt | 6-2,4-6,10-7 |
| ITF Turkey F13 | 2018/03/31 11:00 | Francisco Cerundolo v Lucas Hellfritsch | 6-4,6-2 |
| ITF Portugal F6 Qual | 2018/03/24 13:00 | Lucas Hellfritsch v Martim L Prata | 6-4,4-6,3-6 |
| ITF Portugal F4 | 2018/03/13 11:00 | Lucas Hellfritsch v Miliaan Niesten | 0-6,2-6 |
| ITF Portugal F4 | 2018/03/12 10:00 | Guillaume Dermiens v Lucas Hellfritsch | View |
| ITF Portugal F4 | 2018/03/10 11:00 | Lucas Hellfritsch v Loic Perret | 7-6,7-6 |
| ITF Netherlands F6 | 2017/08/19 10:00 | Tim Van Der Horst v Lucas Hellfritsch | 6-3,6-3 |
| ITF Germany F10 | 2017/08/06 08:00 | Benjamin Hassan v Lucas Hellfritsch | 6-3,6-4 |
| ITF Germany F9 | 2017/07/31 09:00 | Gavin Van Peperzeel v Lucas Hellfritsch | 7-6,6-4 |