Morocco started well against Iran, but were sucker punched at the death by an Aziz Bouhaddouz own goal.
Both sides needed a win in this one, knowing that Spain and Portugal await in the other group games.
Morocco started the match on the front foot, repeatedly provoking goalmouth scrambles in the Iranian box.
A training ground routine saw Hakim Ziyech presented with a glorious chance from a corner, but he miscued his shot and ended up on his backside.
Morocco started well against Iran, but were sucker punched at the death by an Aziz Bouhaddouz own goal.
Both sides needed a win in this one, knowing that Spain and Portugal await in the other group games.
Morocco started the match on the front foot, repeatedly provoking goalmouth scrambles in the Iranian box.
A training ground routine saw Hakim Ziyech presented with a glorious chance from a corner, but he miscued his shot and ended up on his backside.
Juventus centre-back Medhi Benatia shot from inside the box, but it was well blocked by the Iran defence and eventually scrambled clear.
Amin Hamrit weaved his way into a good position, but his curled shot was poor and easily gathered by Alireza Berianvend.
Having been under the cosh for most of the first half, it was Iran who had the best chance of the game.
Alireza Jahanbakhsh played it through for Sardar Azman, who found himself one-on-one with Munir.
However, his touch was poor and he lost the angle for the finish.
The second half was a more attritional affair, with Nordin Amrabat forced off with concussion after an accidental blow to the head.
Ajax attacking midfielder Hakim Ziyech thought he had given his side the lead with a left-footed half-volley, but Beiranvand got across to make the save.
It appeared the Iranians had settled for a draw, but they won a late free-kick on the flank.
The ball was whipped in, and as substitute Bouhaddouz looked to head away he diverted it past his own goalkeeper.
Morocco 0-1 Iran
Bouhaddouz OG (M) 90+5
Morocco: Munir; Saiss, Benatia, Hakimi; Harit (Da Costa, 82), El Ahmadi, Ziyech, Boussoufa; Belhanda, El Kaabi (Bouhaddouz, 77), N. Amrabat (S.Amrabat, 76)
Iran: Beiranvand; Rezaeian, Cheshmi, Pourliganji; Ansarifard, Ebrahimi (Montazeri, 79), Hajsafi, Shojaei (Taremi, 67); Jahanbakhsh (Ghoddos, 84), Azmoun, Amiri