Ahead of their high-profile clash on Saturday, check out the five standout clashes between Arsenal and Chelsea.
Bayern, who won the Champions League in 2013, have yet to hit top form this season, with many players tired after the World Cup and others, including Thiago Alcantara, Bastian Schweinsteiger and Rafinha, out injured.
Barcelona's Neymar struck twice to put the Spanish side in the Champions League final despite a 3-2 loss at Bayern Munich on Tuesday as they progressed 5-3 on aggregate and will face Real Madrid or Juventus next month.
Bayern Munich will not only have to overturn a 3-0 Champions League semi-final first leg deficit against Barcelona on Tuesday but they will have to do it against a superb defence and in the midst of their biggest slump in years.
Bayern Munich are on a mission with coach Pep Guardiola firing up his injury-hit team as they seek to reverse a 3-1 deficit against Porto in the Champions League quarter-final second leg on Tuesday.
An in-form Bayern Munich will be looking to notch up their fourth straight win in the Champions League group stage and seal a spot in the final 16 when the Bundesliga champions face Viktoria Plzen on Tuesday.
Bundesliga champions Bayern Munich suffered their first league defeat in 18 months when they slumped to a 1-0 loss at Augsburg on Saturday as Sascha Moelder's first-half strike ended their record 53-game unbeaten league run.
Ailing democracy icon Nelson Mandela's was "very critical" and "anything is imminent", the anti-apartheid leader's eldest daughter said, as South African President Jacob Zuma on Thursday cancelled a trip to Mozambique.
News of all that's transpired on and off the football field
Lionel Messi was in inspired form as champions Barcelona hammered Celta Vigo 5-0 on Saturday, recording a fourth straight league victory which keeps them top of La Liga after Real Madrid had put the pressure on the Catalans with a 4-1 win at Eibar.
Klaas-Jan Huntelaar has gone on to become one of the Bundesliga's most prolific strikers since he was shunned at Real Madrid and will finally have a chance to show his former club what they are missing on Wednesday.
Runaway leaders Bayern Munich survived a torrid opening against Nuremberg, who hit the bar and had two players carried off injured in the first half hour, before hitting back for a 2-0 win in the Bundesliga on Saturday.
Real Madrid lifted the FIFA Club World Cup for a record fourth time on Saturday after thrashing local side Al Ain 4-1 in the final in Abu Dhabi with the help of impressive distance strikes in either half from midfielders Luka Modric and Marcos Llorente.
Barcelona took a big step towards the Champions League semi-finals.
Carlos Tevez is getting paid 615,000 a week at Shanghai Shenhua, making him the world's best-paid player. His salary is now more than Cristiano Ronaldo's and Lionel Messi's!
Ninety-six years after women won the right to vote in the United States of America, a woman stands a chance of winning the US presidential race. Hillary Clinton -- former first lady, former US senator, and former secretary of state -- has become the first woman to capture a major-party nomination for president, taking another step in a journey that once seemed impossible, but over the last eight years has seemed inevitable. Like everything about her campaign, it was harder than expected.
Nelson Mandela's doctors have dismissed the idea of switching off the ailing anti-apartheid icon's life support until there was a genuine state of organ failure, a close friend of the South African former president has said.
Mergers are not just about balance sheets or marketing synergies; they are also about those who make the synergies real.
Real Madrid tore apart Bayern Munich's ragged defence with a ruthless first-half display as they thrashed the defending champions 4-0 in their own stadium to reach their first Champions League final for 12 years.
Following this stunning turn-around of fortunes for Barcelona, here is a flashback of some of the best come-from-behind wins recorded in Europe's premier club competition.
FIFA presidential candidate Jerome Champagne has protested to football's world governing body about the number of observers allowed into the hall for Friday's election, saying he believed they were working for his rivals.
Ten of the 16 sides also reached the same round two seasons ago and, as usual, the big five leagues dominate with 13 clubs hailing from either the English, Spanish, German, French and Italian leagues.
The three teams with 100 percent records in this season's Champions League can secure their places in the knockout stage this week with two games to spare.
IMAGES from the Champions League matches played on Tuesday
I can actually say I know what it's like to be around someone who was literally a living legend, says film director Kabir Khan.
A summary of sports events and sports persons, who made news on Saturday
Real Madrid were the big winners in Spain as their success at Almeria was followed by a Barcelona draw and a surprise Atletico Madrid defeat.
Brazilian soccer legend Pele is doing 'fine' and will be discharged from a Sao Paulo hospital early on Thursday after he was admitted for stomach pains, one of his aides said.
The goal machines of Bayern Munich, Chelsea and Shakhtar Donetsk cranked into top gear on Tuesday as the Champions League captivated its continental audience with a record 40 goals in one eight-game night.
Cristiano Ronaldo bagged his first five-goal haul in Real Madrid's 9-1 hammering of Granada while title-chasing Bayern Munich and Chelsea won again in Germany and England.
Ruthless Bayern Munich scored five goals in the first 35 minutes on the way to a 7-1 demolition of AS Roma on Tuesday which bore an uncanny resemblance to Germany's win over Brazil by the same score in the World Cup semi-final.
Barack Obama will still be in the Oval Office till the morning of January 20, but gosh, we are already beginning to miss him.
Barcelona's Luis Suarez hit a brace and set up a double for a spritely Lionel Messi to score in his first start after injury in a rampant 6-1 Champions League victory over AS Roma on Tuesday.
Portugal captain Cristiano Ronaldo struck his fifth international hat-trick, including a spectacular volleyed opener, to lead the European champions to a 5-1 win over the Faroe Islands in their World Cup qualifier on Thursday.
A summary of Wednesday's matches in the UEFA Champions League.
Neymar scored twice as Barcelona reached the Champions League semi-finals.
Thiago Silva's extra-time header sent Paris St Germain into the Champions League quarter-finals on away goals.
Following Bayern Munich's brilliant 7-4 (on aggregate) win over FC Porto in the quarter-finals of the Champions League, here's a look at a few memorable come-from-behind victories in Europe's premier football competition.
Images from the Champions League matches played across Europe on Wednesday.
(Reuters) - Real Madrid, Manchester United and Paris St Germain reached the last 16 of the Champions League on Wednesday on a night when the goals flowed all over Europe with United the highest scorers in a 5-0 win at Bayer Leverkusen.