Real Sociedad defender Ion Ansotegi has admitted that the Basque outfit might never get a better opportunity to make the final of the Copa del Rey.

Barcelona make the trip to San Sebastian on Wednesday holding a 2-0 lead from the first leg, but the Spanish centre-back is confident that his side can turn the tie around.

"For our part, we have great enthusiasm about being just one step from the final. We know it's going to be difficult, but we've never had the opportunity to play in a final and maybe this will be our only opportunity," he told reporters at a press conference.

"The fans will believe, they'll make sure there's a great atmosphere at Anoeta, so all that could help to ensure that Barca aren't the Barca we're used to seeing."

The winner will face either Atletico Madrid or Real Madrid in the final, with the latter leading 3-0 from the first leg in their tie.