![Mario Mandzukic scored as Bayern Munich came from 1-0 down against Manchester United on Wednesday to seal a 4-2 aggregate triumph. The German Bundesliga winners, led by coach Josep Guardiola, are looking to become the first team to successfully defend the European Champions League.](https://media.cnn.com/api/v1/images/stellar/prod/140411104758-mario-mandzukic-bayern.jpg?q=w_3089,h_1998,x_0,y_0,c_fill/h_447)
Back-to-back Bayern? —
Mario Mandzukic scored as Bayern Munich came from 1-0 down against Manchester United on Wednesday to seal a 4-2 aggregate triumph. The German Bundesliga winners, led by coach Josep Guardiola, are looking to become the first team to successfully defend the European Champions League.
![FIFA Ballon d'Or winner Cristiano Ronaldo was forced to watch on injured as Real Madrid almost let a 3-0 first-leg lead slip at Borussia Dortmund. The German side won Tuesday's second leg 2-0, meaning Real reached the semifinals of Europe's premier club competition for the 25th time.](https://media.cnn.com/api/v1/images/stellar/prod/140411105250-cristiano-ronaldo-dortmund.jpg?q=w_2268,h_3000,x_0,y_0,c_fill/h_447)
Ronaldo's relief —
FIFA Ballon d'Or winner Cristiano Ronaldo was forced to watch on injured as Real Madrid almost let a 3-0 first-leg lead slip at Borussia Dortmund. The German side won Tuesday's second leg 2-0, meaning Real reached the semifinals of Europe's premier club competition for the 25th time.
![Atletico Madrid are enjoying one of the finest seasons in their history. Coach Diego Simeone has led Atleti to the top of the Spanish league and into the semifinals of Europe's premier club competition for the first time since 1974. A goal from Koke at the Vicente Calderon stadium on Wednesday was enough to see Atletico beat Barcelona 2-1 on aggregate. The current squad, spearheaded by in-form striker Diego Costa, are looking to crown the club European champions for the first time.](https://media.cnn.com/api/v1/images/stellar/prod/140409223010-atletico-victory.jpg?q=w_2856,h_1895,x_0,y_0,c_fill/h_447)
History boys —
Atletico Madrid are enjoying one of the finest seasons in their history. Coach Diego Simeone has led Atleti to the top of the Spanish league and into the semifinals of Europe's premier club competition for the first time since 1974. A goal from Koke at the Vicente Calderon stadium on Wednesday was enough to see Atletico beat Barcelona 2-1 on aggregate. The current squad, spearheaded by in-form striker Diego Costa, are looking to crown the club European champions for the first time.
![Demba Ba came off the bench to score the late goal that saw Chelsea beat Paris Saint-Germain on away goals. Chelsea's Champions League pedigree is impressive, with the London club winning the title in 2012 and reaching the semifinals in seven of the last 11 seasons. Manager Jose Mourinho is looking to win the trophy with a third different club after previous triumphs with Porto (2004) and Inter (2010.)](https://media.cnn.com/api/v1/images/stellar/prod/140411105704-demba-ba-psg.jpg?q=w_3000,h_1830,x_0,y_0,c_fill/h_447)
Demba's delight —
Demba Ba came off the bench to score the late goal that saw Chelsea beat Paris Saint-Germain on away goals. Chelsea's Champions League pedigree is impressive, with the London club winning the title in 2012 and reaching the semifinals in seven of the last 11 seasons. Manager Jose Mourinho is looking to win the trophy with a third different club after previous triumphs with Porto (2004) and Inter (2010.)