#2 Atletico Madrid's incredible defense
Most of Atletico's successes over the last few years has been founded on the strength of an extremely resilient defense which gives little away and prioritizes maintaining a tight shape.
Under Simeone, the Rojiblancos have been forged into the most compact team in Europe and it is no surprise that they regularly find themselves topping lists of the tightest defenses on the continent.
The 2014 La Liga champions possess defenders of the highest level like Diego Godin, Stefan Savic, Jose Jimenez among others, and with them, Atletico have more than enough in the tank to cage the Barcelona attackers and would fancy their chances against their more attack-minded hosts.
With just 19 goals conceded from 30 matches, the Madrid side have the meanest defense in the league and despite having scored a league high 79 goals, Barcelona would still find it extremely difficult to break an ever-resilient Atletico backline.