Barcelona led from the first half by 1-0 and I think a result like this is a predictable result. Considering that Barcelona has a good defense this season, then of course it will make it difficult for Atletico to score goals in this match. So, it seems that with Barcelona not too ambitious to win with a big score, a 1-0 win at half time could be a result that will last until the end of the match as well.
Because in the second half, the fact is that Barcelona can still dominate the match, and of course with good dominance it will make it difficult for Atletico to develop attacks. But yes, apart from these results, basically Atletico will still find it difficult to overtake Real Madrid so that their position will be the same as now until the end of the season.
Atletico immediately threatened when the game had not even been one minute, maybe Atletico's plan was to be able to get their first score before it was too late because their opponents were quite strong in this Spanish league. Antoine Griezmann's left-footed shot hit the Barcelona goalpost.
Barcelona actually able to lead 1-0 first in the 44th minute. Ferran Torres successfully scored with a shot in front of the penalty box. The score lasted until halftime. Until the last minute, Atletico had many opportunities to catch up, but all hope was gone and they could only be patient and accept their defeat against Barcelona this time.