The defender has urged his team-mates to go all out in their bid to pull off a remarkable turnaround in Europe on Tuesday
Four goals from Robert Lewandowski last Wednesday leaves los Blancos adopting the unfamiliar role of underdog on Tuesday night, but despite the size of the task at hand, the defender believes the tie is not over yet.
"It's complicated for us, but if we want to be in the final we have to defeat the best teams. We have to believe we can get back into it," Ramos said at a press conference.
"We know our fans will support us from the first minute. We know what we have to do and what happened in Dortmund. We want revenge. We have negative thoughts from the first leg and we want to play well tomorrow.
"There is no bigger motivation than playing in a Uefa Champions League final. I've been here for eight years and never played in one. Nothing is more beautiful."
Tuesday's encounter at the Santiago Bernabeu is scheduled to kick off at 20:45CET.