Ali Faez Atiyah suffered an injury as his Iraq side topped Group D following a 0-0 draw against Iran at Al Maktoum Stadium on Wednesday.
Iran claimed top spot in Group D of the Asian Cup after a 0-0 draw with Iraq, who were also already through to the last 16 of the tournament.
With little to play for it was a tame affair between the sides on Thursday, with few chances of note created by either Iran or Iraq's attacks.
Ahead of the knockout stages, Iraq coach Srecko Katanec will be concerned about the fitness of Ali Faez Atiyah, who briefly left the field on a stretcher during the second half.