The hosts, who entered the match on the back of two consecutive victories scored the opener after 19 minutes when Sebastian Haller converted from the spot.
Then it was Jovic’s turn as he scored twice in less than ten minutes to make it 3-0 at half time.
Shortly after the restart, Haller doubled his tally before Fortuna pulled one goal back in the 53rd minute.
Two minutes later, Jovic completed his hat-trick to restore the lead. The 20-year-old Serbian scored two more goals to complete the 7-1 routing.