Coutinho had his worst performance yesterday since arriving in Barcelona and it was during a classico.
Throughout the match he was only the shadow of the great player we know, he did little and often made the wrong decisions.
After his brace against Sevilla everyone had hope that he would improve and return to his best level and especially in front of the real or the barca needed his class and his talent but this was not the case he was nonexistent.
This is unacceptable for a player who has cost € 160M.
If he does not improve, Barça may be tempted to sell him at the end of the season.