That's it from me, Harry Slavin. Thanks for joining me this afternoon for the action from Borussia Park. If you're not all Bundesligad out then be sure to stick around for Bayern's trip to Leverkusen in an hours time. For now though, it's goodbye!
FULL-TIME: GLADBACH 2-0 DORTMUND. An incredible result as Lucien Favre's team produce a real smash and grab performance to condemn Dortmund to their first defeat in the Bundesliga this season. Kruse from the spot and Raffael preserve the hosts' 100 per cent home record and give Klopp plenty to ponder.
Yellow Card Christoph Kramer
Dortmund continue to search for something from this game but Ter Stegen is out to smother the ball at the feet of Hofmann. Seconds left now.
Yellow Card Robert Lewandowski
Into three minutes of stoppage time we go. Lewandowski shows his frustration with a stray elbow and Manuel Grafe produces the yellow card once more.
Substitution Nuri Sahin Koray Günter
There was a lot of talk today surrounding the title race this year with Bayen Munich playing Bayer Leverkusen this evening. It may have got to Die Schwarzgelben though as they've shot themselves in the foot this evening and handed the initiative to their Bavarian rivals ahead of tonight's game.
Assist Juan Fernando Arango
GOOOAAALLL!!! GLADBACH ARE OUT OF SIGHT NOW!!! Moments after they hit the bar, Dortmund are dead and buried by a swift counterattack from the hosts. Kruse and Arango link up and play in Raffael who slots past an advancing Weidenfeller.
Yellow Card Martin Stranzl
Reus smacks the crossbar!!! The winger lines up a free kick and clips the top of the crossbar. I don't even think that would have beaten Ter Stegen though, as it looked as though the keeper had that covered too.
Not only is that lead unlikely, but it looks unassailable now with BVB down to 10 men. If it stays like this, it will be a difficult one to take after their dominance all afternoon.
Substitution Havard Nordtveit Christoph Kramer
GOOOAAALL!!! KRUSE GIVE GLADBACH THE LEAD!! The German international steps up confidently and sends Weidenfeller the wrong way to net his fifth goal of the campaign and give the hosts an unlikely lead!
Penalty Goal Max Kruse
PENALTY AND RED CARD!!!! Nightmare for Dortmund! They've been on the front foot all day but are caught out as Arango plays in Nordtveit. The former Arsenal youth product is interrupted from pulling the trigger by Hummels challenge and the referee deems it to be a foul, giving the spot kick and giving the defender his marching orders!
Red Card Mats Hummels
Big chance for Blaszczykowski! He's only been on the field a minute and perhaps that plays a part as he places his effort straight at Ter Stegen from the left hand side of the area.
A substitution apiece for the sides now. Blaszczykowski comes on in place of Mkhitaryan for Dortmund while Herrmann is replaced by Branimir Hrgota for Favre's men.
Substitution Henrikh Mkhitaryan Jakub Blaszczykowski
Substitution Patrick Herrmann Branimir Hrgota
Aubameyang is almost slipped in again but despite his pace he still can't to the ball ahead of Ter Stegen after Reus tries to feed him through.
Just over fifteen minutes left now. The goals haven't been forthcoming despite the numerous attempts on goal. Dortmund are now well into the 20s for efforts at Ter Stegen's net.
Substitution Sven Bender Jonas Hofmann
Here is that substitution and it's Jonas Hofmann that comes on for Sven Bender.
Dortmund are about to make their first change here. Klopp is clearly getting frustrated now with the lack of progress his side are making in this second period.
Marco Reus hasn't been afraid to take on anyone in a white jersey this afternoon and he tries to forge a path into the Gladbach area once more, only to be eventually outnumbered.
Another corner swung in by Reus and this time A yellow shirt does get on the end of it, but Hummels can only drive his header into the ground and wide as it bounces behind for a goal kick.
That's sent into the mixer by Reus but Gladbach are able to clear again. There's just a suggestion here that Dortmund are beginning to climb back on top here.
Another corner coming up for Dortmund. I make that nine now. Reus will deliver this one.
Another great stop from Ter Stegen! Reus whips in a poor free kick but when the ball comes back out for him, he takes aim and sends a devilishly dipping shot towards goal that the Gladbach keeper has to touch over the bar. Stunning stop again from the German keeper.
Gladbach break and it's Max Kruse getting at Grosskreutz down that left side. He manages to work the space to deliver an inviting cutback that Oscar Wendt can only divert wide.
Reus slips through Aubameyang with another defence-splitting pass. The Gabon international takes it round Ter Stegen but from a narrow angle he can't get a shot away and Wendt is there to chest behind for a corner.
Roel Brouwers comes on for the stricken Dominguez. The 34-year-old only has one minute of Bundesliga football under his belt so far this season. Will that prove a chink in the Gladbach armory?
Substitution Álvaro Domínguez Roel Brouwers
That doesn't look good at all for Alvaro Dominguez. He tangles with Robert Lewandowski and doesn't get back up after the Pole lands on top of him. It takes a stretcher to get the Spaniard off the pitch in the end, the player clutching his shoulder. That could be a collarbone injury as well.
Lucien Favre's side look a different proposition in the second period. Some nice interchanges between Arango and Herrmann almost result in Raffael being played into space. Klopp is getting slightly agitated on the sidelines now.
Mkhitaryan goes down under a challenge from Xhaka. It did look like the Armenian was caught and he is hurt, but the man in the middle Grafe isn't convinced.
A nice give and go from Nordtveit sees him burst into the area but Subotic is across well to slide the ball away. This is a bright start to the second period from the hosts.
Gladbach are quick off the mark in the second half to secure their first corner as Arango's sliding effort is deflected over Weidenfeller's crossbar.
The teams are back out for the second 45 and Gladbach get us back underway! Now, just to sit back, relax and wait for the floodgates to open...
They're not used to goalless draws these pair. Monchengladbach have scored at least three times in each of their last four games at Borussia Park. There hasn't even been a 0-0 finish in the Bundesliga so far this term. I don't think we're going to see the first one here this afternoon either.
Pierre-Emerick Aubameyang was holding his left foot at points during that half and you wonder if he'll be able to see out the game. Jakub Blaszczykowski is warming up along with the other BVB subs at the break. We may be seeing him in the second half at some point.
Dortmund really have dominated proceedings in that opening half. They bossed 57% of the possession, but even more staggering is the fact they amassed 17 shots on goal! You'd think that a Dortmund goal is an inevitability at this rate.
HALF-TIME: GLADBACH 0-0 DORTMUND. There may be a few feelings of deja vu around the Dortmund camp at the moment after that first half. Ter Stegen has often reserved his best displays for when Die Schwarzgelben come to town and so it's proving again this afternoon. Klopp's side have dominated but have yet to find a way past the German international as yet.
There is no time added on by Manuel Grafe at the end of the half and that will do us for the first 45 here at Borussia Park!
Another corner for Dortmund. Reus swings this one in and Lewandowski gets up to meet it but he can't get any real purchase on it and it dribbles wide for a goal kick.
Lewandowski is given offside as Aubameyang plays him through. Judging by the replays, it looks as though he may have been played onside by the Die Fohlen back line. There have been a number of dodgy decisions so far in the Gladbach half.
A thumping effort from Sahin from the edge of the area is but Ter Stegen is still standing strong in that Gladbach goal and he gets both fists behind the ball to punch clear.
It was actually Kevin Grosskreutz that was booked for over-zealous protests after the referee gives a throw in against the right-back when the ball had clearly come off Max Kruse.
Yellow Card Kevin Großkreutz
Kevin Grosskreutz is in the line up this afternoon as a makeshift right-back and he is proving a solid replacement as he stops Oscar Wendt from delivering a dangerous cross before knocking the ball away from Kruse to prevent Gladbach's top scorer a clear run at goal.
Reus is on the ball again and he's giving the Gladbach defence further cause for concern. He weaves past a couple of non-existent challenges and pulls a shot just across the face of goal and behind.
Henrikh Mkhitaryan has been everywhere this afternoon and he tries to get a shot away here. It's scuffed by the Armenian but it is almost turned into a promising cross, the ball falling just behind Lewandowski.
It might still be goalless but it's been a frantic opening half hour here. Dortmund are beginning to take a hold of proceedings but the home side have shown on several occasions already this season that they know how to counter.
Reus carves open Gladbach again, this time slipping through Aubameyang. The Gabonese winger is given the freedom of Ter Stegen's area but he can't convert from a tight angle, sending the ball just wide of the far post.
There were 5, yes 5, white Gladbach shirts around Reus there and they still couldn't prevent him from getting to the bye-line. Dortmund's no.11 looks in the mood today.
Great feet from Reus and he almost creates the opening Dortmund needed! The winger drives into the area and slithers between a couple of defenders, gets the break of the ball and sends it back across the six-yard-box, but there isn't anyone in a yellow jersey who can take advantage of it.
Kevin Grosskeurtz forces Ter Stegen into another fine stop! The right-back lets fly from distance and his shot is heading for the top corner before the 21-year-old claws the ball away.
It was his stunning performance against Dortmund back in 2011 that made the rest of the Bundesliga sit up and take notice and it looks like Ter Stegen is on his game again today against Die Schwarzgelben.
Fantastic double save from Ter Stegen!!! BVB have their second corner of the game and after a spot of 6-yard-box ping pong, Reus wallops back in a long-range effort that the keeper has to paw away, before showing brilliant reactions to deny Lewandowski on the follow up.
Pierre-Emerick Aubameyang has been given the nod over Jakub Blaszczykowski this afternoon and he looks lively on that left-hand side. He tries to play in Lewandowski but the pass is just beyond the Pole and ter Stegen can gather.
It's Nuri Sahin who makes the strongest case to the rest of his team-mates to take the free kick but his execution is poor, sending the ball over the bar.
Lewandoswki is brought down in a central position by Granit Xhaka and this is within range for BVB. There are a number in yellow shirts queuing up for a crack at this.
Favre's side threaten to break into the area but Kevin Grosskreutz provides and important interception for Die Schwarzgelben as Max Kruse attempts to pick out the run of Arango.
Or at least what should have been a goal kick. The referee has instead given a corner, much to the amazement of Ter Stegen. Justice is done though as nothing comes of the set piece and Gladbach clear.
It's a very bright start at Borussia Park and Lewandsowki is in behind Gladbach's back four. He tries to take the ball around Ter Stegen but he ends up nudging the ball too far and it goes behind for a goal kick.
Reus gets his first sight of goal as the ball breaks to him in the area. The former Gladbach man latches onto the loose ball but curls his first time effort over the bar.
Gladbach's Venezuelan winger Juan Arango has forged a reputation in the Bundesliga for having a wicked left foot and he hammers the first shot at goal this afternoon but it sails high and wide.
A nudge in the back from Mats Hummels on Max Kruse draws faint appeals for a penalty in the opening moments. The referee for today is Manuel Grafe and he immediately waves away the protests.
Away we go then, Jurgen Klopp's men have only dropped two points all season up until now. Gladbach will be looking to add to that tally as they look to preserve their unbeaten record.
The teams are now out at a jumping Borussia Park. Dortmund are going to get us underway.
The big news from the starting line ups then is that Reus starts against his old club. Gladbach coach Lucien Favre is widly credited with nurturing the winger's talents. Will he come back to torment his old boss once more, as he did last season in BVB's 5-0 drubbing of Die Fohlen at Signal Iduna Park?
DORTMUND: (4-2-3-1) Weidenfeller; Durm, Hummels, Subotic, Grosskreutz; Sahin, Bender; Reus, Mkhitaryan, Aubameyang; Lewandowski.
GLADBACH: (4-2-2-2) ter Stegen; Wendt, Stranzl, Dominguez, Jantschke; Nordveit, Xhaka; Arango, Herrmann; Kruse, Raffael.
We're about ten minutes from kick off so let's get some team news before the sides head out. We'll start with the home side.
Both sides have had a positive start to their campaigns and it's a case of the irresistable force against the immovable object this afternoon as Klopp's table toppers take on a Die Fohlen side that are yet to be beaten at home in the league this season. Which will win out today?
Hello and warm welcome to this Bundesliga clash where the Borussia's prepare to do battle as Dortmund face Monchengladbach at Borussia Park. I'm Harry Slavin and I'll be here to take you through all the action!
Times In BST
Live Final scheduled Suspended Cancelled Postponed