Robert Lewandowski shows lovely technique to fire a shot against the bar from outside of the box. So close for the Poland international.

Dortmund had been growing in the last few minutes but got away with that one. Two in fact - as the referee waves away Bayern claims for a penalty.

Thomas Muller was the man closest to it as Marcel Schmelzer raised an arm. Ball to hand or hand to ball? A bit of both?

There's a real creeping inevitability about this one. Bayern are in full flow, cutting forward with ease to the rhythm of the home fans unflagging support.

But here's Marco Reus! He's in space on the edge of the box but flashes a shot wide. Deflection and corner but normal service is resumed as Bayern press the away side back to square one.

Image source, AP

Thomas Muller denied! Mitchell Weiser jinks away from the Dortmund left-back and plays a beautifully weighted pass into Muller's stride, but Mitchell Langerak is out quickly to block.

A second Bayern goal kills this one you feel.

Image source, Reuters

No changes at the interval from either side. Dortmund get us back under way.

Jurgen Klopp is wearing a gilet on the sidelines. In homage to Tim Sherwood? Or the other way round possibly.

Here we go then, Dortmund's players are giving it mouth in the tunnel. Plenty of geeing up going on. Much more in attack required from them in this second half. Bayern don't look ruffled.

Image source, EPA

Wednesday's second semi-final sees third tier club Arminia Bielefeld take on Wolfsburg.

Bielefeld have already knocked out three top flight sides in Hertha Berlin, Werder Bremen and Borussia Mönchengladbach.

Can they make it one more against Wolfsburg? The cup is Dieter Hecking's side's only chance of silverware. They have run Bayern closer than any other team this year (is 15 points that close?) but have already missed out on the title.

John McEnerney: Only one place for Klopp to go and that's Manchester City or maybe Arsenal if they ever come to their senses and cut Arsene Wenger loose. Come to the PL JK!

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And all this without the (not original) dynamic duo of Franck Ribery and Arjen Robben.

Robben has been in sensational form for Bayern this season but has only just returned from injury to make the bench tonight.

Ribery, well he's still out. But on this evidence Bayern are well-equipped to beat Barcelona in their Champions League meeting next Wednesday without him...

The break. And Dortmund need it. Can Jurgen Klopp work his magic at half-time? If not there's only one way this one is going. Bayern have been cruising it.

Robert Lewandowski take a bow! Just for the sheer invention and courage to have a go from there.

The Poland striker does go for the lob from a ridiculous angle and is mighty close to making it two zip, the ball landing just wide of Mitchell Langerak's goal.

Another Xabi Alonso corner but this time it's met by the head of Mats Hummels.

Pierre-Emerick Aubameyang - he is so rapid - is let loose on the break and momentarily Manuel Neuer is scrambling back. Did he think Aubameyang was going to go for the lob?

Bayern soon crowd it out though. Nothing doing for Klopp and co so far.

The Dortmund players must be desperate for the interval. They've been chasing the ball pretty much non-stop for the best part of 40 minutes.

Tricky to keep composed in possession when you're shattered.

If Jurgen Klopp wants to bow out with a fairytale finish at the German Cup final then he's got his work cut out now.

Bayern are looking very comfortable. How on earth do they move the ball so quickly?

How can Dortmund respond now? They risk leaving themselves open to being caught out again if they go for it - Bayern's goal came straight after a dangerous-looking Dortmund break.

As we've seen so often this season, Bayern are ruthless on the counter.

Image source, Reuters

Image source, Reuters

They might not need him at this rate actually after all. Robert Lewandowski is deadly - at the second attempt.

Played through on goal - he beats the offside trap expertly - the Poland striker chips over the keeper but is denied by the post, before providing a lovely finish from a very, very tight angle to put his side 1-0 up. Fully deserved.

Here comes Bayern's Mitchell Weiser down the Dortmund left. A few stepovers aren't going to fool anyone into believing he's actually Arjen Robben though. Dortmund continue their resistance.

How long until the real Robben is risked?

Phillip Lahm in particular has looked so assured in possession in the Bayern midfield. Fine, he's a world class full-back, but Pep throwing him in midfield has given the 31-year-old even greater influence.

Bayern's best chance remains that Thomas Muller header though. For all their good interplay, there's still been only one shot on target.

Dortmund need to keep it now and they're lucky to do so as Pierre-Emerick Aubameyang takes a heavy touch into the channel.

Bayern do win it back though. It's almost inevitable as wave after wave of scampering striped shirts harries the Dortmund yellow.

Bayern are bossing it. 75% possession. There's been some lovely touches from a midfield that looks streets ahead of their Dortmund counterparts.

Image source, AFP

Half-time at Barcelona and Luis Suarez has put the home side 5-0 up just before the break.

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