Croatia opened the scoring with a free kick that went straight from the training ground to the pitch, with Perisic heading a free kick across goal for Gvardiol to score with a diving header in the seventh minute.
Two minutes later, Achraf Dari took advantage of the deflected ball off Modric after Hakim Ziyech's in-swinging free kick, making it 1-1 for Morocco with a free header.
Both teams were playing with relative freedom and control from end to end: Modric's effort had Bouno saving and scrambling to clear from Perisic, while at the other end Achraf and Ziyech combined for Achraf's cross to just evade En-Nesyri.
Croatia retook the lead in the 42nd minute after Morocco failed to clear their lines after a move involving Modric and Lovro Majer broke down.
The ball fell to Mislav Orsic, who curled the ball in off the post from an angle using his instep and left Bono stranded.
