So who's your money on?

This one was all Bayern for so long that you feel Dortmund must have the psychological edge as we head into 30 minutes more.

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The whistle goes. Extra-time.

And penalties if we need it...

Two minutes of stoppage time played already. From where?

Marco Reus sums up his night so far with a wayward volley from outside the box. Marco van Basten-esque it was not.

What a challenge from Sokratis on Mario Gotze. The German international was in World Cup-winning territory there, but the Greek defender slid in with perfect timing to win the ball.

No sign of how long to be added on as Dortmund pump the ball forward...

More bite from Dortmund in midfield but they give the ball back straight away. They just can't seem to keep it.

Mario Gotze is jinking down the left wing now. No dice though. Dortmund standing firm.

Those changes seem to have broken the spell Dortmund were enjoying. Either that or Bayern have just realised they're in danger of throwing this one away, having dominated for 75 minutes.

Patient, probing play, looking for a winner.

Five minutes to go for Dortmund to make this count. Jurgen Klopp must be all over the place. Jakub Błaszczykowski has come off the the away side, replaced by Kevin Kampl.

Image source, EPA

This could be a big moment for Bayern. Forget this match, what about the Champions League too?

Arjen Robben is coming off. He looks to have hurt his calf again. Mario Gotze comes on but that's a huge blow for Pep Guardiola's side.

Marco Reus is almost - again almost - played through but Juan Bernat covers well.

But moments later he does find himself through and Manuel Neuer makes a great save low down to his left to turn his shot wide of the post.

What on earth has gone on here?! Total transformation.

Henrikh Mkhitaryan! The Armenian attacking midfielder really has made the difference since coming on.

Manuel Neuer can only turn his latest effort - a vicious volley - wide of the post, the ball fizzing off his wrists.

Dortmund have left it late but we could have a grandstand finish here...

Here come Dortmund again! Marco Reus almost latches on to a through ball but Medhi Benatia leans him out of it and Manuel Neuer collects. Not so cool back there was he?

Bayern have made another change - Bastian Schweinsteiger replacing Thomas Muller.

Image source, AFP

And with just their second shot on target Dortmund draw level!

Pierre-Emerick Aubameyang slides in at full stretch to meet a Henrikh Mkhitaryan cross, Manuel Neuer flaps the ball away but it's already crossed the line.

Where did that come from?

Dortmund finally register their first shot on target but in truth Pierre-Emerick Aubameyang's header took a thick slice off a Bayern shoulder.

Naturally Manuel Neuer is as cool as ever.

Dortmund change things too and Shinji Kagawa makes way for Henrikh Mkhitaryan.

Will the Armenian make the difference? And can he do it quicker than Arjen Robben?

I thought it would be right winger Mitchell Weiser to make way - although he's looked decent tonight - but Thiago is coming off for Arjen Robben.

This could get ugly...

Image source, AFP

A wave of applause sweeps around the stands as Arjen Robben is seen warming up. The Dutchman must be relishing taking on these tired Dortmund legs.

Not a great one this time from the evergreen Xabi Alonso (who is still sporting a terrific beard you'd be glad to know).

One moment of genius could drag Dortmund back into this game, but Marco Reus, the man you'd have thought would be best-placed to provide it, has been a spectator in the main.

Rafinha is booked for a wild challenge. Easiest decision the referee will ever make.

The danger seems to have passed, for now in any case. Dortmund can breathe again and look to keep hold of the ball.

Frustration for Klopp as Marco Reus is penalised for a foul on Medhi Benatia and Bayern are back with it, Thiago peeling through the static Dortmund midfield as the home side force a corner.

Thiago now with a chance as he turns in the box to find space. There's loads of it for the former Barca man, but no power whatsoever on his left-foot strike. Easily gathered.

Dortmund are rocking.