The Spanish outfit recently lost back-to-back games against Ajax and Athletic Bilbao, and have come under criticism for a change of style this season.
"Given the implications for Barcelona in every game we play, for ourselves it's always important to win, to be first and to give a good performance," he told reporters.
"We have to separate ourselves from any possibility that we'll have any easy games. All games have consequences, more negative than positive.
"This is a game for us to reinforce what we did the other day and it's a game in which we have to play better and for us to finish the group as leaders. This is a very important game for us."
Barcelona have already booked their spot in the knockout stages of the Champions League.