#1 Atletico Madrid
The 'unbreachable defense' is what they are called, as Atletico Madrid have had an extremely tight defensive mechanism since the arrival of Diego Simeone. With their two strong defenders Jose Gimenez and Diego Godin, who conceded the least number of goals in the world cup 2018, have proven to be two of the best defenders in the world. Even when they are standing 4th in the La Liga table, they have conceded only 5 goals this season.
The full-backs, on the other hand, have played an important role in order to stabilize the defense. Lucas Hernandez and Santiago Arias have been able to apply width into the system and can fall back to the defensive line in no time at all, building the natural back four line and forming a 'wall' for the opposition to stop their attack.