The Fifa 2014 World Cup experienced its first draw as Iran held Group F rivals Nigeria in Curitiba.
Nigeria dominated possession but created few chances against a disciplined side managed by ex-Manchester United coach Carlos Queiroz.
The Super Eagles’ best opportunities came in the first half when Ogenyi Onazi fired a yard wide before Ahmed Musa went close with a free-kick.
Iran’s Reza Ghoochannejad forced a great save from Vincent Enyeama.