The Blaugrana are currently 13 points clear at the top of the league table with 81 points from 31 matches.
"We still have seven matches left, 21 points are still in play," Barca's official website quotes him as saying.
"Therefore, we aren't champions yet. We took an important step today. On Saturday against Levante, we'll try to take another."
Barcelona defeated Real Zaragoza 3-0 away from home in La Liga on Sunday.