Stadium: Campo 4 Round: 26 Ground: Clay
| Challenger Francavilla - Herrdubbel | 2018/04/25 08:00 | Draganja/Draganja v Molchanov/Zelenay | 2-6,2-6 |
| Challenger Barletta - Herrdubbel | 2018/04/09 13:25 | Draganja/Draganja v Motti/Vavassori | 6-2,6-7,6-10 |
| Challenger Shenzhen - Herrdubbel | 2018/03/15 08:55 | Te/Wu v Draganja/Draganja | 4-6,6-3,10-7 |
| Challenger Shenzhen - Herrdubbel | 2018/03/13 02:00 | Hurkacz/Majchrzak v Draganja/Draganja | 5-7,6-7 |
| Challenger Zhuhai - Herrdubbel | 2018/03/06 02:00 | Hsieh/Junaid v Draganja/Draganja | 6-2,6-3 |
| Challenger Bergamo - Herrdubbel | 2018/02/19 15:00 | Draganja/Draganja v Grigelis/Motti | 7-6,2-6,5-10 |
| Challenger Budapest - Herrdubbel | 2018/02/11 17:10 | Draganja/Draganja v Felix A-Aliassime/Kuhn | 6-2,2-6,9-11 |
| Challenger Budapest - Herrdubbel | 2018/02/09 17:30 | Draganja/Draganja v Siljestrom/Ymer | 6-4,6-3 |
| Challenger Ostrava - Herrdubbel | 2018/05/02 14:15 | Martinez/Nagal v Kolar/Pavlasek | 6-3,6-7,10-3 |
| Challenger Budapest - Herrdubbel | 2018/02/05 13:10 | Kolar/Pavlasek v Panfil/Uzhylovskyi | 6-7,6-1,10-12 |
| Challenger Koblenz - Herrdubbel | 2018/01/18 15:35 | Arends/Sancic v Kolar/Pavlasek | 7-6,2-6,10-5 |