Atletico Madrid has beaten Barcelona 2-0 recently in the Champions League and they have always posed a serious threat. Other teams have floundered against Barcelona. Apart from utilising Antoine Griezmann's skills, what has Simeone done tactically since his arrival?
Some of them are, all players are committed in defensive duties. Even players with offensive roles they try to recover balls. High pressure over the oponent. They practice a lot for corners and free shots and they have much better results on that now than before. They practice more and they are more prepared and are more effective at counterattacking
More than committed in defensive duties I'd say that most of the players are committed to their manager because they trust Simeone and all of them have given 200% of their potential.
Players like Griezmann didn't want to quit because they have learned a lot and improved their skills with Simeone.
Apart from Wenger, Simeone is the European trainer with more seasons in the same club in a row.
I don't know but I've heard someone say that there were 6 defenders in the match. SIX. And Barca's formation was 4-3-3 so 2 defenders can mark one attacker.
And since Griezmann is fast he can bypass the defense of Barca.
Oh, and It was the first match that messi haven't made a shot to the goal since 2011 : 0