The agents of Premier League stars have flagged a clause in players' contracts that states a club must 'not do anything that stops a player featuring for his country' as the row over a breakaway European Super League rumbles on.
The so-called Big Six of the Premier League, as well as three Spanish and three Italian teams, have faced enormous backlash after the unveiling of proposals for a breakaway tournament on Sunday.
The plan has been roundly condemned by both the FA and the Premier League while UEFA president Aleksander Ceferin has warned players who take part could be banned from representing their countries in the World Cup and European Championships.