Stadium: Centre Round: 29 Ground: Hardcourt outdoor
| Challenger Portoroz MD | 2018/08/09 16:30 | Cacic/Miedler v Begemann/Olivetti | 3-6,6-3,10-4 |
| Challenger Portoroz MD | 2018/08/08 20:55 | Gonzales/Lammons v Cacic/Miedler | 3-6,5-7 |
| Challenger Portoroz MD | 2018/08/07 14:00 | Saraiva/Verbeek v Cacic/Miedler | 3-6,2-6 |
| Challenger Portoroz MD | 2018/08/09 19:55 | Khabibulin/Stakhovsky v Granollers/Rosol | 1-6,1-6 |
| Challenger Portoroz MD | 2018/08/08 18:30 | Draganja/Serdarusic v Granollers/Rosol | 4-6,4-6 |
| Challenger Portoroz MD | 2018/08/07 19:25 | Granollers/Rosol v Agamenone/Martinez | 5-7,6-2,10-4 |