Barca are top of the table after victory over Celta Vigo.
"The most important thing is to stay at the top of the table," Alba said. "After dropping some points, the objective is to maintain the way we played in the first half.
"We are happy with the result. It was a really good first half, although the rhythm dropped after the break and we created fewer chances."
Alba was also happy to be part of a back four which has now kept three clean sheets in a row in the league.
"In the first few weeks of the season we conceded a lot of goals, but we have corrected that among everyone," the defender added. "We all have to defend to attack well."