Barcelona captain Andres Iniesta says they could be made to “suffer” by Sevilla in Sunday’s Copa del Rey final.
Iniesta is aiming to lead his team to their second domestic double in a row, having won La Liga last Saturday.
Sevilla, though, can also complete a double, having beaten Liverpool in Wednesday’s Europa League final.
“We have to play a complete game against an opponent that will make us suffer in key moments of the match,” Spain midfielder Iniesta said.
The 32-year-old has played down a controversy over pro-Catalan independence flags appearing at the final.
A government decision, on security grounds, to ban Barcelona fans from bringing the Estelada flags to Madrid’s Vicente Calderon Stadium was overturned by a judge this week.
Iniesta said: “I just want the people to go and have a good time. Winning the cup could make everyone happy, regardless of what you think of a flag.
“The club have given their opinion, I will keep mine to myself because what I say could be misinterpreted.”