Madrid have won seven of their last eight games, a streak which has propelled them to the top of the table ahead of Barcelona thanks to a better head-to-head record against their arch-rivals.
Calderon told Cadena SER radio station: "I think winning the league now is a lot less difficult than it was two months ago. We have to live this to the fullest, but with humility. I have always been convinced that we could win the league."
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