Jose Mourinho's players successfully came back from a 3-1 defeat in Paris, to win 2-0 at Stamford Bridge and progress to the Champions League semi-finals on away goals on Tuesday night.
Prior to the game, the Blues weren't given much chance by the majority of people and went into the game as underdogs to progress.
However, in true Mourinho fashion, Chelsea were able to stay solid at the back and sneak the ball into the back of the net just as the fans began to think it was over, thanks to the gangly leg of Demba Ba.
Ba's goal, which caused Mourinho to sprint down the touchline, placed Chelsea in the semi-finals, which they will contest against Atletico Madrid.
While Atletico are probably the best opponent Chelsea could have wished for, their magnificent form this season has placed them top of La Liga, in front of Real Madrid and Barcelona, who we are so used to seeing dominant the Spanish league each year.
However, The Mirror claim that Chelsea are the least likely to take the Champions League crown, with just a 14 percent chance of winning it.
They claim that Bayern Munich are most likely to secure it for the second year running, with 39 percent, while Real Madrid come in close behind with 30 percent. Despite not reaching a Champions League semi-final in over 30 years, Atletico Madrid are still 17 percent likely to win it.
Although maths and statistics are great, football is inconsistent – particularly when it comes to Chelsea. Their comeback against PSG proved that, as did their ability to claim the Champions League in 2012, despite coming sixth in the Premier League.
You can never rule Chelsea out, especially over two legs. The likes of Petr Cech, John Terry, Gary Cahill and Branislav Ivanovic provide so much experience at the back and the squad as a whole can defend like their lives depend on it (think Chelsea vs. Barcelona in the 2012 semi-final), particularly when they are 'underdogs'.
So many times this season, Chelsea have gone out to attack weaker opposition, failed to find the net and conceded as a result. However, when playing the bigger teams, where defence is key, Chelsea have been unbreakable this season, particularly at home.
At this stage, the players still at the club who experienced the 2012 victory, they will be beginning to believe that they can do the same thing year and claim a second Champions League medal in just three years, so confidence will be extremely high.
Of course, we cannot forget the Special One, Mourinho, who I'm sure will have a few tactical tricks up his sleeve.
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