Round: 60 Ground: Hardcourt indoor
| ITF Croatia F1 | 2018/03/07 09:00 | Anze Arh v Kai Lemstra | 7-5,6-1 |
| ITF Germany F3 Qual | 2018/01/29 16:30 | Dominik Boehler v Kai Lemstra | 7-6,7-6 |
| ITF Germany F3 Qual | 2018/01/28 17:00 | Charley Emhardt v Kai Lemstra | 1-6,2-6 |
| ITF Germany F2 | 2018/01/23 15:35 | Kai Lemstra v Pedro Cachin | 3-6,3-6 |
| ITF Germany F1 | 2018/01/11 17:10 | Elmar Ejupovic v Kai Lemstra | 6-3,6-4 |
| ITF Germany F1 | 2018/01/10 11:45 | Stefan Seifert v Kai Lemstra | 6-2,6-7,4-6 |
| ITF Germany F1 | 2018/01/08 12:30 | Karlo Cubelic v Kai Lemstra | 6-4,2-6,4-6 |
| ITF Germany F1 | 2018/01/07 11:30 | Tim Heger v Kai Lemstra | 4-6,4-6 |
| ITF Croatia F1 | 2018/03/04 12:30 | Marco De Rosa v Ivan Sabanov | 1-6,0-6 |
| ITF Egypt F4 | 2018/02/04 12:00 | Adrian Andrzejczuk v Marco De Rosa | 6-1,6-3 |
| ITF Egypt F3 | 2018/01/27 10:00 | Marco De Rosa v Ren Nakamura | 2-6,1-6 |
| ITF Turkey F28 Qual | 2017/07/29 08:00 | Marco De Rosa v Omer Berk Gorgun | 3-6,6-7 |
| ITF Italy F16 Qual | 2017/06/03 08:30 | Marco Miceli v Marco De Rosa | 6-1,6-1 |
| ITF Croatia F2 | 2017/03/11 08:00 | Marco De Rosa v Bjorn Nareyka | 4-6,6-7 |
| ITF Italy F13 | 2016/05/28 12:30 | Marco De Rosa v Francesco Ferrari | 1-6,0-6 |
| ITF Croatia F3 | 2016/03/12 09:00 | Marco De Rosa v Alessandro Ragazzi | 3-6,1-6 |