The Ex-Brazil star fears Barcelona could miss out on the top four in La Liga except if they change things quickly and drastically develop under Ronald Koeman if they are to save their season.
are in the last 16 of the Champions League but fell 3-0 at home to Juve in the final game of the first round to stand second in the group.
They have performed less than expected domestically too, standing ninth in La Liga and are 12 points behind leaders Atletico Madrid.
are away from the quality required to compete for the European title this term.
"For now, I'm not seeing Barcelona producing enough football to fight for the Champions League title this season, but things can change if they manage to knockout a strong opponent in the last-16 as it would boost their confidence,"
"Many are starting to doubt whether Barca can claim a top four spot at La Liga in order to take part in the Champions League next season.
"If they keep under-performing then that is a real possibility. The team isn't playing well, and things are getting uglier.
"It's crucial that they wake up as soon as possible and get back to producing good performances and results."
"At the end of Juventus match, Antoine Griezmann didn't find many excuses for their loss and blamed all the group for their lack of attitude on the pitch. I think he was right on his claims.
"You must be fully committed when playing in a Barcelona shirt - full of history and glory - but that isn't happening now, which I consider unacceptable. It's not normal to watch Barcelona losing 0-3 at home in an important match."
's greatest concerns is the fate of superstar Lionel Messi, who is in the final season of his deal and he is not willing to strike a new deal.
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