"It was very difficult for us and we needed a lot of patience. They were very tightly-packed, they closed all the channels and it was difficult to reach their area," Valverde told reporters.
"It may have looked like we were close to scoring, but it was hard for us. It was a matter of maturing and continuing to push. With the goal, it became a bit easier.
"It was a difficult test for us, their fans put up a lot of atmosphere. We overcame the moments of difficulty and we have six points. We also did it last week. Overall, we're happy. The possession that counts is the one that leads to chances."
Barcelona will return to La Liga action after the international break with a derby against Espanyol.