20:57 BST
Real Madrid say they are opposed to plans by their bitter rivals Barcelona to play a league match in the United States this season, saying the move “sets an unacceptable precedent”.
Barcelona and Villarreal are seeking permission from the football authorities to play in Miami in December.
Fan groups of the respective clubs have already threatened legal action if the plan progresses, and now Real have expressed their opposition to the move.
“Real Madrid would like to express to its members, supporters and football fans in general its strongest rejection of the proposal to play outside Spain the match…between Villarreal and Barcelona,” the capital club said in a statement.
“The measure, promoted without prior information or consultation with the clubs participating in that competition, violates the essential principle of territorial reciprocity that governs two-round league competitions (one game at home and the other at the opposing team’s), altering the competitive balance and granting an undue sporting advantage to the applicant clubs.
“The integrity of the competition requires that all matches be held under the same conditions for all teams.
“Unilaterally modifying this regime breaks the equality between contenders, compromises the legitimacy of the results and sets an unacceptable precedent that opens the door to exceptions based on interests other than strictly sporting, with a clear impact on sporting integrity and the risk of adulteration of the competition.
“If this proposal is carried out, its consequences would be so serious that they would mean a before and after for the world of football.”