Should los Rojiblancos draw the Blues on Friday, there will be a headache for Diego Simeone as Courtois won't be able to play.

On Wednesday, Atletico Madrid sealed their place in the semi-finals for the first time since 1974, and their debut appearance since the tournament was re-branded as the UEFA Champions League from the previously titled European Cup in 1992.

Los Rojiblancos successfully dispatched Barcelona over two legs to send Lionel Messi & Co. packing, much to the joy of both their supporters and neutrals alike.

Whilst Koke's goal was the shot that effectively eliminated the Blaugrana, a big reason for the squad's success was the heroics of young goalkeeper Thibaut Courtois.

The lanky 21-year-old has kept Messi from scoring in the six matches the two sides have met--something that many keepers many years his senior will certainly look on with much respect.

However, much to the dismay of Atletico fans--Courtois may not be able to feature in the semi-finals.

The reason? The Belgium international is on loan from Chelsea and due to a clause in his contract, he can't play against the Blues--unless if his new home are willing to stump up some serious cash.

The 6 million man: Atletico will have to cough up 3 million per game to field Courtois against Chelsea

 

 

 

Impressive: The young keeper only conceded 1 goal against Barcelona in 180 minutes

 

His heroics are also a big reason why Diego Simeone's men are the only unbeaten side still remaining in the competition--something that even reigning title holders Bayern Munich have not achieved.

Teammate Koke recognizes Courtois's vitality to his side as indicated by his remarks to the media:

 

 

 

Should the worst come to pass, and if fans will view an Atletico-Chelsea semi-final, second-choice shot-stopper Dani Arunzubia will be called upon in what will definitely be the biggest game of his career. The 34-year-old Spanish international was signed as a back-up to the young star this past summer.

Obviously, this is something that will please Chelsea fans and cause much worry for Atletico supporters. Then again, we just might see a Madrid derby tomorrow and old foes Jose Mourinho and Pep Guardiola facing off in the other match.