The El Clasico will be held on December 18 at the Nou Camp.
"I want to go to the Camp Nou and win, the rest doesn't matter to me," Carvajal explained.
"I try to avoid any other issues.
With the Champions League draw set to take place on Monday in Nyom, Carvajal believes Los Blancos face a difficult draw.
"Anyone from pot 1 will make it difficult for us," he added.
"[But] none of us fears that.
"There will be time to think about that."