Despite the 1-0 loss, Morocco were very impressive in the game and unplayable for the large part.
Iran were missing the calming influence of suspended holding midfielder Saeid Ezatolahi as Morocco over-ran them in the centre of the park with the clever Mbark Boussoufa directing play as the African side frequently attacked in numbers.
Morocco playmaker Hakim Ziyech, who plays for Ajax, has a real creative spark towards the final third as he created an incredible 21 assists last season for the Dutch giants. Supporters of Morocco watch the match in a fan zone.
Morocco impressed in qualification and only conceded one goal as they made it to the tournament in Russian Federation.
Apparently, Carlos Queiroz's men had not been able to attend overseas training camps either, for similar reasons.
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Following his remarks, the President later emphasised his remarks were "sarcastic" when asked by reporters at the White House. Trump became the first sitting US president to meet with a North Korean leader when he met with Kim on Tuesday in Singapore.
Iran's preparations have been disrupted by United States sanctions against the country, with American sportswear giant Nike refusing to supply equipment to the team and both Greece and Kosovo cancelling friendly matches against them last month.
This will be Morocco's fifth World Cup Appearance and their first in 20-years.
Iran have played in two World Cups since Morocco last featured without winning a game. Morocco started well but then faded.
"We came here without World Cup preparations".
Medhi Benatia led Morocco into Russian Federation at the back of a solid defensive performance in the qualifiers where they conceded no goals at all.
In a group where Spain and Portugal are strong favourites to qualify for the knockout stage, the outcome gives Iran an outside chance of an upset but was a bitter blow for an enterprising Moroccan side. But sometimes you have to take one for the team.
Substitute forward Aziz Bouhaddouz headed a free-kick from the left into his own net near the left post four minutes into the second-half injury time as a dominating Morocco left the field shellshocked. And Iran made the most of it.
"UEFA feels that the instrument's widespread use would not be appropriate in Europe", UEFA announced in a statement, following the conclusion of the World Cup in 2010. They will be relishing the idea of playing their first game against Iran, a game where they know momentum could be built for the rest of the group stages.