Barcelona defender Ronald Araujo says they need to perform better after victory at Villarreal.
Araujo was outstanding for the 1-0 win on Sunday.
He said: "It's always difficult against an opponent like this. We are working very well in defence, which was something we needed to correct from last season. I'm happy with the numbers, for helping Marc (ter Stegen). The midfielders and forwards are also closing down the spaces.
"We sometimes lack the ability to sentence games. When you only lead 1-0 it can get complicated. But we're very happy with the win."
On the gap in the standings, 11 points back to Real Madrid, he was blunt: "We cannot lose our concentration. We don't have to look at what the others are doing, we have to do our own thing."