I watched their match against Atletico and it was at their home so I just said it was because of that they drew a tie match with top defensive team in the league. But when i watched them this afternoon against Barca I was beside myself at how they defended and did not let them get a scoring opportunity except for the first few minutes after the half when they scored.
They are a team that just needed that win at Barcelona's home to boost their confidence and show that they are not just a flash in the pan sort of team.
They will carry this confidence into their next match and will probably win a couple more before they come back down to earth.