Stadium: Opatija 3 Round: 28 Ground: Clay
| ITF Croatia F3 MD | 2018/03/22 14:10 | Celebic/Nagy v Grahovac/Kajin | 6-1,6-2 |
| ITF Croatia F3 MD | 2018/03/20 14:25 | Ιβάν Σαμπάνοφ/Ματέι Σαμπάνοφ v Celebic/Nagy | 6-7,2-6 |
| ITF Tunisia F2 MD | 2018/01/19 13:20 | Celebic/Nagy v Carli/Turchetti | 2-6,6-7 |
| ITF Tunisia F2 MD | 2018/01/18 12:55 | Μάρκο Μπορτολότι/Τζουλιαν Οκλεπο v Celebic/Nagy | 5-7,6-4,9-11 |
| ITF Tunisia F2 MD | 2018/01/16 13:15 | Celebic/Nagy v Dorozhkin/Munafo | 6-4,6-2 |
| ITF Tunisia F1 MD | 2018/01/10 13:35 | Celebic/Nagy v Gutierrez-Ferrol/Perez Contri | 4-6,5-7 |
| ITF Croatia F3 MD | 2018/03/20 13:00 | Antonescu/Dima v Kowalczyk/Kozielski | 6-7,6-7 |
| ITF Germany F2 MD | 2018/01/23 13:30 | Kowalczyk/Kozielski v Μπέντζαμιν Χασάν/Νίκλας Σκχέλλ | 2-6,6-4,6-10 |
| ITF Egypt F38 MD | 2017/12/15 08:00 | Kowalczyk/Kozielski v Goveas/Kadhe | 4-6,3-6 |
| ITF Egypt F37 MD | 2017/12/05 13:45 | Fellin/Weis v Kowalczyk/Kozielski | 2-6,6-3,10-7 |
| ITF Poland F8 MD | 2017/08/01 17:00 | Dembek/Smola v Kowalczyk/Kozielski | 6-2,6-2 |