Flag bans, travel headaches and a religious regime video among bumps in road, as team prepares to be first to play in country with which it is at war

Iran will present a major challenge to Fifa’s “football unites the world” slogan on Monday by becoming the first country in World Cup history to compete on the soil of a host nation with which it is at war.

The national team’s opening match against New Zealand in Los Angeles will kick off amid continuing hostilities between Iran and the US that have intensified in recent days, as a fragile ceasefire has failed to hold and attempts at reaching a negotiated settlement have sputtered.