The 30-year-old claimed he felt like the Spanish champions "were playing away from home" during their 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.
"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."
Sergio Busquets praised the quality of the victors at Camp Nou and rued the way that the 10-man Catalans - following Jordi Alba's sending off - allowed los Che to make the hosts pay for their profligacy.
"It had been a long time since we had lost here," the midfielder said after a run of 25 La Liga home wins in a row was ended. "It’s an untimely slip-up.
"Valencia made the most of their weapons and we were unable to do more. They’re in better shape under their new coach, and they have really good players.
"We started well. We played well for the first hour and created a lot of scoring chances. Then they played their hand and we didn’t play well. It’s unfortunate."
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.