Sevilla management are convinced of upsetting Barcelona today.
Sevilla's season has been hugely inconsistent, but club president Jose Maria Del Nido says his side can beat Barca on Sunday.
"Sevilla are capable of beating any rival and we have shown that," he said.
"We have to go out to beat the super-champion in the knowledge that we are up against the best team of all time.
"It will be a vibrant and special match."