The Portugal international netted a hat trick to help the Santiago Bernabeu side to a crucial victory in the race for the league title, and Ramos had nothing but praise for the former Manchester United star.
"Cristiano Ronaldo is the best player in the world. We're lucky to train with him every day and to have him with us," Ramos told reporters.
"Taking three points was vital after drawing against Valencia. A team like Real Madrid lives with pressure, but we know how to withstand it and we have to be ready for everything. Each match is a matter of life and death.
"We earned an important victory. Everything turned out well and we're calm. We don't think Barcelona are going to drop many points, but we depend on ourselves and our four-point cushion allows us to keep up the good work."
Real Madrid resumes league action on Saturday when it hosts Sporting Gijon, before facing Barcelona at Camp Nou on April 21.
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