Tensions have escalated sharply just hours before the Copa del Rey final between FC Barcelona and Real Madrid, set to be played this Saturday at La Cartuja. Indeed, according to MARCA, Real Madrid

Barcelona are one of two teams in contention to claim a historic quadruple, and stage two is right around the corner. Hansi Flick's men already have the Supercopa in their back pocket, and are now aiming to down Clasico rivals Real Madrid in Saturday's Copa del Rey final.

Real Madrid are considering refusing to play the Copa del Rey final against Barcelona amid a row with referees, reports claim. Los Blancos take on their La Liga rivals in the third El Clasico of the season on Saturday but may not even fulfil the fixture following a shock update.