Defender encourages his side to remain united despite seeing hopes of a tenth European crown fall apart after controversial 2-0 defeat to bitter rivals after Pepe was sent off
Jose Mourinho's men are 2-0 down on aggregate and will be without Ramos after the Spaniard picked up a yellow card at the Bernabeu, meaning he misses the next game.
Pepe will also miss the trip to Camp Nou after his sending off - the hot potato which marred the game in controversy as Mourinho was also given his marching orders.
However, Ramos believes his side have not been killed off, and maintains their exit from Europe remains inconclusive as there are still 90 minutes to play.
"In football anything is possible," Ramos wrote on his Twitter account, as reported by Marca.com.
"There are still 90 minutes. We have to stay united because like I said, you never know in football."
Ramos then made his feelings known towards referee Wolfgang Stark, who sent off Pepe for a foul on Dani Alves.
"Simply lamentable," he added.