Real Madrid captain Sergio Ramos says they should appeal Cristiano Ronaldo's dismissal in the Supercopa.

Barcelona were defeated 3-1 at home, with Ronaldo sent off.

He was dismissed when judged to have dived under pressure from Samuel Umtiti and shown a second yellow card, but his captain isn't ruling out having him available for Wednesday's second leg.

"I was far away, but I think it was a piece of play in which [Ronaldo] lost his balance, rather than feigning anything," Ramos said after the match.

"It could be appealed.

"Sending off a key player with 10 minutes remaining of a Clasico in which we've given our all is something which needs to be evaluated and thought about."