Stadium: Campo 3 Round: 45 Ground: Clay
| Challenger Perugia Qual | 2018/07/09 10:35 | Agustin Velotti v Nikola Cacic | 6-1,6-3 |
| Challenger Perugia Qual | 2018/07/08 12:10 | Nikola Cacic v Davide Natazzi | 6-3,6-3 |
| Challenger Recanati Qual | 2018/06/30 17:25 | Zhizhen Zhang v Nikola Cacic | 6-7,6-3,6-4 |
| Challenger Almaty Qual | 2018/06/09 05:35 | Nikola Cacic v Renta Tokuda | 6-7,4-6 |
| Challenger Shymkent Qual | 2018/06/04 05:00 | Jurij Rodionov v Nikola Cacic | 7-6,6-7,7-6 |
| Challenger Shymkent Qual | 2018/06/03 05:50 | Nikola Cacic v Joao Menezes | 6-4,7-6 |
| Challenger Shymkent Qual | 2018/06/02 05:30 | Nikola Cacic v Marko Djokovic | 7-5,6-4 |
| Challenger Samarkand Qual | 2018/05/13 05:00 | Roman Safiullin v Nikola Cacic | 6-3,7-5 |
| ITF Italy F18 | 2018/07/10 11:00 | Andrea Guerrieri v Genaro Alberto Olivieri | 4-6,3-6 |
| ITF Italy F17 | 2018/07/04 13:00 | Andrea Guerrieri v Riccardo Bonadio | 3-6,4-6 |
| ITF Italy F17 | 2018/07/03 16:30 | Tommaso Roggero v Andrea Guerrieri | 5-7,7-6,3-6 |
| ITF Italy F15 | 2018/06/23 12:00 | Andrea Guerrieri v Peter Heller | 1-6,3-6 |
| ITF Italy F15 | 2018/06/22 12:40 | Andrea Guerrieri v Alessandro Ceppellini | 6-4,6-1 |
| ITF Italy F15 | 2018/06/21 16:35 | Toby Martin v Andrea Guerrieri | 4-6,1-6 |
| ITF Italy F15 | 2018/06/19 09:35 | Andrea Guerrieri v Marco Miceli | 6-1,6-4 |
| ITF Italy F14 Qual | 2018/06/09 18:35 | Andrea Guerrieri v Tommaso Roggero | 4-6,1-6 |