bundesliga.com brought you LIVE updates from the Allianz Arena throughout the encounter - relive the highlights below...
FC Bayern: Neuer - Lahm, Boateng, Dante, Alaba - Martinez, Schweinsteiger - Robben, Müller (Pizarro 83'), Ribery (Shaqiri 89') - Gomez (Gustavo 71')
Barcelona: Valdes, Alves, Piqué, Bartra, Jordi Alba - Xavi, Busquets, Iniesta - Alexis, Messi, Pedro (Villa 83')
|Müller 25', 82'|
|Possession:||37 %||63 %|
|Gomez 37'||Bartra 39'|
FULL TIME!: That brings an end to our live coverage of this evening's UEFA Champions League semi-final first leg. Bayern have put themselves in a fantastic position to reach the title decider for a second successive year after destroying what many experts believe to be the best club side in history.
Thanks for joining us and stay tuned on bundesliga.com for a full match report and all the best pictures, as well as all the reaction and analysis to tonight's game...
FULL TIME!:bundesliga.com Reporter at the Allianz Arena: "What a performance! The Bayern tornado ripped through Barcelona. The home support are cheering their heroes with chants of "Final! Final". Barca's players leave the field with their heads hanging.
FULL TIME!: The referee blows his whistle to end Barcelona's misery. There aren't many teams - if any - that can take Messi and Co apart like that.
90' The fourth official has signalled that three minutes of added time will be played.
89'Xherdan Shaqiri comes on for Ribery.
bundesliga.com Reporter at the Allianz Arena: "Bayern are truly in the zone and their fans are still urging them forward. The Barca don't know what's happened to them."
82' That was to be Müller's last action, with the midfielder - who injured himiself in a collision with Valdes - is replaced by Pizarro.
82' GOAL!: Unbelievable! Müller flicks in David Alaba's cross from the left to make it > 4-0!:
77' That was close! A free-kick from Barcelona's Xavi catches Bayern off guard and Bartra is in acres of space with only Neuer to beat, but he hashes his close-range shot well wide.
73' GOAL!: What a terrific goal that was! Ribery sprints 70 yards to launch a counterattack and passes to Schweinsteiger. The midfield man finds Robben on the right hand edge of the penalty box. His stepover takes him past a defender, before curling a delicious curler into the far corner. 3-0!:
71' There's that substitution, with Gustavo coming on for goalscorer Mario Gomez.
69'Barcelona finally register another shot on goal, but Bartra's tame effort is easily collected by Neuer.
bundesliga.com Reporter at the Allianz Arena:Bayern coach Heynckes has sent Claudio Pizarro, Xherdan Shaqiri and Luiz Gustavo to warm up on the touchline - it looks like a substitution is on the cards."
65'Müller's dribbling on the edge of the box leaves Pique in a tangled mess on the floor, but the Bayern man can't pick out a cross for a team-mate.
61' The Bayern fans are urging their team on, with loud chants of 'Bayern!' ringing out from every corner of the stadium-
58'Barcelona are trying to haul themselves back into the game by playing keep-ball. They hold on to possession well, but cannot find a way through the wall of Bayern defenders.
54'Franck Ribery goes close to making it 3-0, but he drags his left-footed shot wide of the post after a weaving run from Robben.
bundesliga.com Reporter at the Allianz Arena: "Bayern deserve their lead. Their concentration at the back has been superb and they're attacking well down the flanks. Messi is a shadow of his normal self - Bayern are keeping him in check with quick, aggressive tackling."
49' GOAL!:Mario Gomez gives Bayern a two-goal cushion, tapping in from close range following an Arjen Robben corner.
47'Javi Martinez picks up a swift booking for an over-exuberant tackle on Andres Iniesta.
SECOND HALF: We're underway again in Munich, with Bayern immediately looking to gon on the front foot.
CHAMPIONS! You've also got time to check out bundesliga.com’s dedicated website celebrating FC Bayern Munich’s 22nd Bundesliga title and 23rd all told. With interviews, quotes and highlights of all the action from the record titleholders, record-breaking season - it’s a must see for any FC Bayern fans!
VOTE Why not spend the half-time break voting for your Bundesliga Team of the Season on our Fanzone page? There are plenty of players, including a few familiar Bayern faces, to choose from and videos to help you make your decision. Get involved and cast your vote!
TWITTER Don’t forget to follow bundesliga.com on Twitter for LIVE updates on the scoreline, insights into all the major talking points and a whole host of other Bundesliga goodness.
HALF-TIME:Jupp Heynckes' side deservedly go into the break with a 1-0 lead after a superb team performance in the first 45 minutes.
41'Bayern are like tigers out on the pitch, not giving Barcelona an inch, snarling into every tackle.
bundesliga.com Reporter at the Allianz Arena: "Since Bayern's goal the intensity has gone up a notch. The fans are cheering every Bayern move and Javi Martinez in particular is drawing roars of approval from the crowd thanks to his determination going into every tackle."
35'Bayern have the wind in their sails now and are relentlessly harrying Barcelona all over the pitch. The Spaniards are struggling to make headway going forward.
30'Barcelona hit back almost immediately, as Dante diverts Dani Alves' right-wing cross narrowly beyond his own post.
28' The goal was Müller's sixth in 11 Champions League matches so far this season.
25' GOAL!:Thomas Müller heads Bayern in front from close range after Dante leapt highest at the back post from Philipp Lahm's cross.
19'Bayern are mixing things up in attack, playing long balls forward, looking to take advantage of Mario Gomez's height.
15'Bayern are defending very compactly but look threatening on the break - and Barcelona are leaving spaces at the back to be exploited.
bundesliga.com Reporter at the Allianz Arena: "Neither coach can sit still and both are on the edge of their techincal areas. Bayern have started well and are going aggressively into their challenges."
7' It's an intense opening so far, with FC Bayern playing a high defensive line to reduce Barcelona's space in midfield.
4'Bayern win the first corner of the game, but Franck Ribery's in-swinger from the left is headed clear.
2' First chance for FC Bayern. Great play down the left from Arjen Robben leaves the Dutchman with a clear sight of goal, but his right-footed shot is straight at keeper Valdes.
KICK-OFF: Barcelone get the ball rolling and immediately settle into their famous tiki-taka style - though they havent' got out of their own half yet.
Kick-off - 3 mins: The teams are out on the pitch now and lined up ready for the spine-tingling Champions League anthem!
bundesliga.com Reporter at the Allianz Arena: "When the Barcelona players came out shortly after, the noise was equally loud - but in boos!"
bundesliga.com Reporter at the Allianz Arena: "Manuel Neuer appeared on the pitch a few minutes ago for his pre-match warm up, alongside substitute keeper Tom Starke. The noise to receive them was deafening!"
Kick-off - 15 mins: Don't forget to follow bundesliga.com on Twitter for LIVE updates on the scoreline, insights into all the major talking points and a whole host of other Bundesliga goodness.
Kick-off - 20 mins: Bayern coach Jupp Heynckes has selected Mario Gomez to start up front tonight. Fellow forward Mario Mandzukic is suspended.
Kick-off - 30 mins: Hello and welcome to bundesliga.com's LIVE coverage of tonight's UEFA Champions League semi-final first leg between FC Bayern Munich and FC Barcelona at the Allianz Arena. We'll be giving you your fill of all the live, text action including informative snippets from our in-stadium reporter.