Why would they? They aren't obliged to attack to begin with, they'll keep it tight and look to nick a goal at some point. Simeone is no mug, he'll do everything in his power to make sure Atletico do not concede at home. In fact, in the last 3 and bit seasons of knockout football, Atletico have conceded ONCE at home. Crazy record. However, it will be intriguing to see how Atletico deal with a team pretty similar to themselves in Leicester. Bayern/Real will be epic, Juventus/Barcelona will be fascinating and Dortmund/Monaco will be bat shit crazy. It's a cracking draw all round.