Barcelona have not started well in La Liga so far this season and drew their first game against an easy opponent. Now they are playing away against Villarreal and are losing so far, but the match is not over yet. I think it would be better for them to get into the Europa League like they did last year to try to get to the final. In the Champions League it will be very difficult for them.
In the end, Barcelona was able to narrowly win after Robert Lewandowski scored a goal in the 71st minute for Barcelona so that the home team had to be willing to lose to Barcelona because they were unable to equalize in the remaining time or after Robert Lewandowski scored the last goal for Barcelona in the match. I think Barcelona is still good enough to compete in La Liga this season even though they had a draw in the opening game this season, but for the Champions League I still doubt Barcelona can do better because there are many teams who will show their true strength here.