Oman came from behind twice, cancelling out Iran’s 40th and 54th minute strikes with their own in the 53rd and 74th minutes before Al Amrani hit home the winner in the 89th minute.
“We didn't focus during the last 15 minutes,” he said. “I told the players that leading by one goal was not enough, and if they didn't score more it would be difficult for us. There were many chances in the first half that we did not take. Oman, however, made good use of theirs in the second.”
Iran has to defeat Tajikistan on Friday to stand a chance of advancing.