Dani Alves says Barcelona bemoaned that Camp Nou felt like an away ground due to a lack of support as they slipped to a 3-2 loss to Valencia on Saturday.
Alexis Sanchez and Lionel Messi each had to help the Catalans restore parity after Daniel Parejo and Pablo Piatti twice put the visitors in front, but Gerardo Martino's men were powerless to stop Pablo Alcacer's winner.
Alves believes the team needs all the help they can get from the crowd, despite claiming the loss of points and putting their top-of-the-table status at risk did not worry him.
"Sometimes it feels like we're playing away from home," the Brazilian full-back told reporters after the match. "The connection [between the team and fans] has to be positive.
"We lost and have to get back up. There's no time for regrets. We have to be mature and learn from defeat so it does not happen again. We must aim to control the whole game, not just a stretch.
"We dropped three points whilst controlling the game. We scored, then became too predictable. It is not a problem of overconfidence. Losing the lead in La Liga today is not important."
Defeat to Juan Antonio Pizzi's men still leaves Barcelona at the top of the Liga, although title rivals Real Madrid and Atletico Madrid have a golden chance to go clear on Sunday.