Kaka slated Real Madrid's mentality after defeat to Real Zaragoza.

Real's defeat all but hands the title to Barcelona.

"I think that we were really lazy in the first-half and showed a lack of spirit. We were slack. It cannot happen again this season," Kaka said.

"You can lose points but not with the attitude we showed in the first-half. No matter what happens, you have to change that, as we did in the second-half."

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