Iran head coach Carlos Queiroz has raised tensions before the crucial Group B fixture between his side and the USA on Tuesday, addressing criticism of the Iranian regime by drawing parallels with American school shootings.
Queiroz's latest controversial intervention relates to a row over a tweet by the US Soccer Federation which appeared to have deliberately doctored the Iranian flag.
The USA's social media post removed the symbol of the Islamic Republic from the flag. Iran even called for the US to be banned from the World Cup.
