Manuel Esteban 'Manolete' is a journalist well known for his historical knowledge of Atletico, and he has selected this all-time XI:
Atletico's all-time best XI: Jan Oblak, Francisco Delgado Melo, Luis Pereira, Diego Godin, Isacio Calleja, Adelardo, Luis Aragones, Diego Simeone, Jose Ufarte, Jose Eulogio Garate, Radamel Falcao.
Meanwhile, 'Los Blancos' expert Tomas Roncero, has picked out this star-studded lineup:
Real's all-time best XI: Iker Casillas, Michel Salgado, Sergio Ramos, Pirri, Roberto Carlos, Uli Stielike, Raul Gonzalez Blanco, Juanito, Emilio Butragueno, Alfredo Di Stefano, Cristiano Ronaldo.
What do you think of the two XI's? Let us know in the comments.