Postpublished at 20:04 British Summer Time 21 April 2015
These are the average positions of the Bayern team so far tonight. They're not going to sit back, are they?
Image source, optaSummary
Thiago and Boateng with early headers
Unmarked Lewandowski heads Bayern's third
Muller & Lewandowski with low finish
Porto's Martinez with header, Alonso free-kick
Semi-final draw takes place on Friday
Postpublished at 20:04 British Summer Time 21 April 2015
Image source, optaBarca in frontpublished at 20:02 British Summer Time 21 April 2015
There's also been a goal in the Nou Camp, and it's bad news for Paris St-Germain as Barcelona go 4-1 ahead on aggregate. Great play from Andres Iniesta sees the playmaker burst through a number of challenges before sliding in Neymar who makes no mistake.
Postpublished at 20:01 British Summer Time 21 April 2015
BBC Radio 5 live's Pat Nevin at Allianz Arena"It was absolutely brilliant play. Juan Bernat put the ball in and it was a superb header. There was nothing the goalkeeper could do about that.
"A negativity will settle in around Porto you'd expect."
GOALpublished at 20:00 British Summer Time 21 April 2015
Game on. Game very much on.
The Bayern crowd goes wild as Juan Bernat whips in a delightful cross from the left and Thiago Alcantara gets in front of his marker to head home from six yards out at the near post.
Image source, APPostpublished at 19:58 British Summer Time 21 April 2015
BBC Radio 5 live's Pat Nevin at Allianz Arena"Robert Lewandowski is the one who created the chance. He found Thomas Muller brilliantly and followed up like every good centre forward does. Porto were lucky - their keeper wasn't going to get there if it was inside the post."
HITS THE WOODWORKpublished at 19:56 British Summer Time 21 April 2015
So, so close from Bayern. Thomas Muller breaks through and his powerful shot is parried by the goalkeeper. From the follow-up, Robert Lewandowski hits the post. Porto all at sea there.
Postpublished at 19:54 British Summer Time 21 April 2015
Porto's Diego Reyes is making his Champions League debut tonight and he makes a fine interception to stop a dangerous Robert Lewandowski in his tracks. He read that well.
Postpublished at 19:52 British Summer Time 21 April 2015
The barnstorming start we might have expected has not materialised as yet. We're still waiting for the first serious effort on goal. It's like the cricketing equivalent of letting the first over pass by your off stump and through to the keeper.
Postpublished at 19:51 British Summer Time 21 April 2015
Both Pep Guardiola and Julen Lopetegui are decked out in designer suits on the touchline. Dapper dudes. The Porto coach is a little more animated while Pep quietly prowls - betraying a little bit of tension, perhaps.
Image source, AFPPostpublished at 19:50 British Summer Time 21 April 2015
The Premier League's Martin Atkinson is the man with the whistle tonight. He might even be a contender to take charge of the final if he does well tonight.
Postpublished at 19:48 British Summer Time 21 April 2015
Porto are pressing Bayern well, but the Germans are already stretching the Portuguese with their sharp passing moving the ball from left to right, back to the left. Any holes will be exploited.
Image source, AFPPostpublished at 19:47 British Summer Time 21 April 2015
BBC Radio 5 live's Pat Nevin at Allianz Arena"If Bayern Munich can get a goal in the first 15 or 20 minutes, I make them strong favourites. But if Porto last longer than that, it's hard to call it."
Postpublished at 19:47 British Summer Time 21 April 2015
Bayern are in their traditional red and blue stripes while Porto are decked out in dark blue. The hosts try and seize the early initiative by attacking from the kick-off.
KICK-OFFpublished at 19:46 British Summer Time 21 April 2015
Let's get this show on the road. Bayern Munich... what have you got?
Postpublished at 19:43 British Summer Time 21 April 2015
A wall of sound greets the players as they emerge from the glow of the tunnel. Flags, mosaics, music... no expense spared on this, the grandest of stages.
Postpublished at 19:41 British Summer Time 21 April 2015
BBC Radio 5 live's Pat Nevin at Allianz Arena"Porto wingers Yacine Brahimi and Ricardo Quaresma are going to shove back tonight. But they will have to get forward and help striker Jackson Martinez out.
"Martinez will be disappointed that Dante hasn't made it tonight in Bayern Munich's defence."
Postpublished at 19:41 British Summer Time 21 April 2015
The Bayern players meet in the tunnel of Allianz Arena, beneath luminous red lights. It's like the foyer of a sunbed shop as the players wish each other luck.
Postpublished at 19:40 British Summer Time 21 April 2015
The atmosphere is building to a crescendo in Allianz Arena as the players prepare to walk out onto the pitch. The Bayern fans have an unshakeable belief in their team. They don't think they're getting knocked out tonight.
Join the debate at #bbcfootballpublished at 19:38 British Summer Time 21 April 2015
John McEnerney: Tonight could be the night Pep is found out. Karl-Heinz Rummenigge said Guardiola has an A-Z of plans - didn't look that way last week, he's never had a plan B.
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On the roadpublished at 19:37 British Summer Time 21 April 2015
We know the Champions League is the biggest football club competition in Europe, but ahead of this year's final the trophy has been touring the world and it stopped off in Dallas, USA earlier this week. Patrick Kluivert and Eric Abidal accompanied it - and put on their best smile for selfie purposes. I believe the man with the phone is ex-USA defender Jimmy Conrad.
Image source, Getty Images