Morocco's own goal gave Iran the win and a crucial three points to start Group B play.
After an exhausting game, Iran won its World Cup opener against Morocco on Friday in St. Petersburg, 1-0, thanks to an own goal in added time.
The substitute Bouhaddouz scored past his own goalkeeper with a near post header as he attempted to defend the free-kick taken by Ehsan Hajsafi.
Morocco became the second Middle East country to yield a late winning goal on Friday, after Egypt lost 1-0 to Uruguay in Group A, due to a last-minute header from Jose Gimenez.
