Inter, who lead 3-1 from the first leg, were thought to have benefited from the rub of the green in terms of decisions last week in Milan.
"The only thing I told my players was that I wanted them to support the work of the referee and if the Barcelona players want to do the same, it will be easy for the referee," he said.
Barca coach Pep Guardiola says Barca need to stay true to their footballing philosophy.
"It's a game of football, not a magic night, and we have to be ourselves – we will go out and try to generate as many chances as we always do," he said.
"We don't know if we are capable of turning this around, but we will give everything to try and get to the final."