Round: 62 Ground: Hardcourt outdoor
| ITF Croatia F4 Qual | 2017/03/25 10:00 | Nikolas, Klemen v Dabryian, Artsiom | 2-6,6-0,3-6 |
| ITF Croatia F3 | 2017/03/19 08:30 | Nikolas, Klemen v Kralj, Kevin | 3-6,3-6 |
| ITF Croatia F2 | 2017/03/12 08:30 | Pompei, Edoardo v Nikolas, Klemen | 7-5,6-2 |
| ITF Croatia F2 | 2017/03/11 10:00 | Krneta, Nino v Nikolas, Klemen | 5-7,4-6 |
| ITF Croatia F1 | 2017/03/05 08:00 | Nikolas, Klemen v Johannson-Holm, Jakob | 1-6,1-6 |
| ITF Croatia F1 | 2017/03/04 08:00 | Roko Horvat v Nikolas, Klemen | 6-0,2-6,3-6 |
| ITF Germany F3 | 2017/01/22 11:30 | Nikolas, Klemen v Benjamin Hassan | 2-6,6-1,4-6 |
| ITF Turkey F47 Qual | 2016/11/19 06:00 | Nikolas, Klemen v Glvac, Andrej | 3-6,1-6 |