Barcelona president Joan Laporta refused to taunt Real Madrid after their Champions League elimination.
Barca face a difficult test against Stuttgart, with their tie sitting at 1-1 ahead of the second-leg at the Nou Camp.
"I am not pleased with the misfortunes of others. I feel a sadness for Florentino (Perez), I sense what's going on," said Laporta. "Now, when things do not go right for our eternal rival, it's normal that people out on the street want to make the most of it."