The Brazilian described the balance of power in La Liga as a "tremendous injustice" and insisted that the battle in the lower reaches of the table is often more interesting.
"We are talking about two teams that no-one can compare to," he told AS. "It is a tremendous injustice that the league is so unbalanced. That Barca and Madrid have budgets that are so immensely greater increases doubts that this is the best league in the world.
"It is more interesting lower down in the table than it is in the fight for the title. [At Atletico] we have to try to fight with our weapons. We, with much work and humility, have barely reached them.
"From humility we have achieved many things, but to fight them is very complicated."
Real and Barca have finished first and second in La Liga for the last five seasons, with Valencia being the only side to beat them to the title in 2004.