Atletico Madrid was just lucky, all the teams they met are weak teams except PSG and Barcelona, in the next few weeks they will meet Bayer Leverkusen, this match Atletico Madrid might lose. I would give more chance Leverkusen to win because they have better squad, while Atletico Madrid is only depend on Griezmann all the day.
I don't think so, from the performance they showed in Laliga, I think they stand chance over this teams, just that If they repeat what they did to Barcelona in Laliga to other teams I Champions league then they should be preapare to loose the particular game ,not really the performance but the style they used could land them in conceding goals.UCL is no play ground I know, let's see what will happen in their next game but imo I think they should win Leverkusen from what have been watching so far...