Atletico Madrid have become one of Spain and Europe’s most consistent sides, with their success in recent years built on the sturdiest of foundations.
Diego Simeone guided his side to La Liga title glory in 2014, breaking Real Madrid and Barcelona’s duopoly in the Spanish top-flight.
In the same season he oversaw a run to the Champions League final, with a return to that stage made in 2016 – only for both adventures to be ended by arch-rivals.
Throughout a memorable period for the club, defensive solidity has formed the cornerstone of their best work.
That continues to be the case, particularly in Europe where the club have kept a remarkable 15 clean sheets in their last 17 Champions League fixtures at Vicente Calderon.
Jan Oblak has been a key figure for Atleti during that run, with the Slovenian goalkeeper proving to be an immovable object at times.
Domestically, Atletico have also shown themselves to be the toughest of nuts to crack.
They boast the most clean sheets in La Liga this season (16), while only Paris Saint-Germain (17) can claim to have bettered that haul across Europe’s top five divisions.
Another notable feather in the cap of the Rojiblancos is that they are the only side to have secured a shut-out against their free-scoring neighbours at Santiago Bernabeu during Zinedine Zidane’s reign.
1 - Atlético are the only side to have kept a clean sheet away from home against Real Madrid under Zinedine Zidane (in all comps). Wall. pic.twitter.com/Pk84l2bV0J— OptaJose (@OptaJose) April 8, 2017
This is the size of the challenge facing Leicester City in their Champions League quarter-final showdown in the Spanish capital.
Snatching an away goal will be a big ask for Craig Shakespeare’s side, as will attempting to secure a first leg lead, with Atleti having won 16 of 21 home games in the competition under Simeone. Their only defeat came against Benfica in September 2015, while they are unbeaten in nine previous knockout fixtures.
They have conceded only four goals in this season’s competition to date, with five clean sheets collected in eight outings – including one at home to much-fancied Bayern Munich