Anybody forces to do it. There is not a law written. But it is a fact that allows to show if a club accepts with sportsmanship the victory of the rival. The Real Madrid still has not congratulated to the Barcelona after conquering his 29ª Glass of Rey.
Something that yes have done a lot of Spanish clubs, already are of First, Second or inferior categories. Simply congratulate to the winner, of the same form that had done with the Alavés. The white club, with Florentino Pérez in command, always boasts of lordship and bumps that in front of a success like this have not pronounced , still, in this regard.
The Barcelona club always congratulates to the champions
It fits to remember that the Barça himself congratulated to the Real Madrid by the title of League attained the past weekend, doing gala of his values and leaving to a side the rivalry that process the two teams.
We will see if in the next hours the Madrid decides to command some writing in his social networks congratulating to the Barça. On 3 June they will play the final of the Champions and sure that the Barça goes back to congratulate to the winner, already are the whites or the Juventus.