What’s happening at the World Cup one day before tournament starts?

The biggest ever World Cup is almost here, with the United States, Canada and Mexico ready to host 48 teams in an expanded competition .

The football finally begins on Thursday as Mexico host South Africa at Mexico City’s iconic Estadio Azteca.

But before a ball has even been kicked, the tournament has already thrown up plenty of controversy. Here are the five biggest talking points on the eve of the big kickoff.

The Iranian football federation, FFIRI, says the US has revoked its allocation of tickets for its team’s World Cup group games, accusing the cohost of obstructing the attendance of Iranian supporters under the shadow of war .

“In an unexpected move, the allocation granted to the Iranian Football Federation has been withdrawn, and under the current circumstances, the federation is unable to provide even a single ticket to supporters of the national team,” FFIRI said.

The US has presented several bureaucratic hurdles for Iran at the World Cup, including refusing to issue visas for some of its support staff, as the two countries have effectively remained at war since the US-Israeli attacks on Iran on February 28.

Neither FIFA nor US organisers have publicly commented on the Iranian accusation.

The tournament kicks off in Mexico’s capital on Thursday afternoon, but various protests are putting pressure on the authorities in the run-up to the big game.