La Liga president Javier Tebas says this year's Copa del Rey final should be abandoned if Barcelona and Athletic Bilbao fans whistle Spain's national anthem when it is played before kickoff.

The Catalan and Basque sides met in the 2012 decider, which is remembered by some for Spain's then king Juan Carlos and the anthem being drowned out by loud whistles from both sets of fans.

Such behaviour does not go down at all well with many politicians in the Spanish capital, and the Partido Popular candidate for mayor of Madrid this week wrote that teams who showed such "hate" should not take part in the Copa at all.

Tebas, who earlier in his career was associated with nationalist party Fuerza Nueva, told AS that he would personally suspend this year's game on Saturday, May 30 should the anthem be whistled, although the call would be with the Spanish federation as they organise the competition.