Group G opens at SoFi Stadium on Tuesday morning with a fixture that carries more weight than its modest billing might suggest. Iran against New Zealand is, on paper, a battle for the scraps below Belgium and Egypt, but three points here could well determine which of these two sides survives a group that offers precious little margin for error.

Neither nation arrives with a cushion. Group G stands at zero points across the board, as it must at the opening round, and the standings will take their first meaningful shape before the week is out. Belgium and Egypt are widely regarded as the group's stronger sides, which means this fixture functions, in practical terms, as a semi-final for third place before a ball has been kicked. Lose here and the route to the knockout rounds becomes extraordinarily narrow. Win and the calculation shifts entirely.

Iran are appearing in their third consecutive World Cup, a run that reflects genuine development within Persian football. They qualified from Asia's notoriously unforgiving qualification process and carry the experience of having shared a group with England, the United States and Wales at the 2022 tournament in Qatar. New Zealand, meanwhile, return to the World Cup after a lengthy absence, having come through the Oceania and inter-confederation playoff route. Reaching the finals at all is a significant achievement for the All Whites, and they will be determined not simply to make up the numbers.

The two sides have no record of previous meetings at senior international level, which removes any psychological baggage and leaves this entirely as a contest of present quality.

Both squads report no fresh absences ahead of kick-off, which is welcome news for coaches piecing together their opening selections. A clean bill of health at the start of a tournament is a small luxury, and both sides will take it.

The data, for what it is worth, leans on nobody in particular. The prediction model splits this one into even thirds: home win, draw and away win each sit at 33 per cent, which is the model's way of saying it genuinely does not know. Given the lack of head-to-head history, the equivalence of their situations and the pressure that both carry into the match, that uncertainty feels honest rather than evasive. SoFi Stadium holds over 70,000, and the crowd in Los Angeles, with its sizeable Iranian diaspora, may yet provide the closest thing to a home atmosphere either side will experience in this tournament.