I don't see Chelsea's wingers trying to beat a full-back on the outside in order to cross the ball very often.
I just don't see teams trying hard enough to get in behind Atletico in order to actually make them defend difficult situations instead of always having the play in comfortable areas in front of them.
It's not easy yo get in behind them, but that is what you need to try and do.
This is how I believe you trouble a team like Atletico:
It requires good movement a players with the ability to do things quickly.
I think these are skills which are far less prevailent than they used to be. Fewer teams have an interest in really playing wide or crossing, fewer teams and players move well in order to create space.
I blame the stupid, tippy-tappy Barca for these developments.