Fifa usually take disciplinary action for general breaches of regulations by players or a country’s supporters in the weeks after a tournament, although this could be taken more seriously because it occurred in a World Cup match between the two countries.
There is no prospect of Argentina losing their place in the final.
Liberal Democrat leader Ed Davey has called for the Argentina players who were holding the banner to be suspended for Sunday’s final against Spain.
Davey referenced Uefa’s ban of Spain players Alvaro Morata and Rodri for one game after chanting “Gibraltar is Spanish” during their side’s Euro 2024 celebrations.
Gibraltar is an enclave at Spain’s southern tip that has been under British rule since the 18th century and Spain have long called for its return.
There is precedent for Fifa banning a player who has held up a banner with a similar political message.
After the 2012 Olympic Games bronze medal match, South Korea midfielder Park Jong-woo held a sign in Korean which read “Dokdo is our territory”.
More commonly known as Liancourt Rocks, Dokdo is a group of inlets administered by South Korea to which Japan holds a claim.
Park was charged by Fifa and a few months later handed a two-match suspension, meaning he sat out two World Cup qualifiers.
More to follow.