2015 Croatia Open Umag – Singles
Pablo Cuevas was the last edition champion, but he chose to defend another of his previous title in Båstad which was held simultaneously with the Croatia Open Umag this year. Dominic Thiem won the title, defeating João Sousa in the final, 6–4, 6–1. Seeds The top four seeds receive a bye into the second round. Draw Finals Top half Bottom half Qualifying Seeds Qualifiers Qualifying draw First qualifier Second qualifier Third qualifier Fourth qualifier References Main Draw Qualifying Draw 2015 ATP World Tour 2015 Singles 2015 in Croatian tennis