US vice-president JD Vance said the US is looking forward to welcoming fans from across the globe for the tournament but says supporters must "go home" afterwards.

The US will host 78 of the 104 matches, including the final.

The World Tourism Forum Institute has warned that strict immigration policies in the US and global political tensions could "significantly" disrupt international arrivals.

"I know we'll have visitors, probably from close to 100 countries," said Vance.

"We want them to come. We want them to celebrate. We want them to watch the game.

"But when the time is up, they'll have to go home."

The Fifa Club World Cup, which starts next month, is being held across 12 stadiums in the US.

About two million overseas visitors are expected for the tournament.

"We're processing those travel documents and visa applications already," said Department of Homeland Security Secretary Kristi Noem.

"That is obviously going to be a precursor to what we can do next year for the World Cup as well. It is all being facilitated."