The 23-year old Croatia international is keen to leave Zagreb but fancies a move to Germany rather than the Premier League despite the interest according to his agent, Ivan Cvjetkovic.
"We have told Dinamo that Mario wants to leave the club," he told Bild.
"Werder are showing great interest. We will know more in a few days.
"If there is no solution by the end of the month, it will be difficult to complete it in time as Dinamo would play him in the Champions League qualifiers.