Madrid are just given a reminder of how dangerous Dortmund can be on the counterattack! Gundogan threads a lovely pass down the right for Piszczek who gallops down the pitch before cutting inside. He had options available but the hosts eventually manage to clear. There were five-men in that attack for the Germans!
19
Ronaldo a tad guilty of trying to force a goal. He picks up the ball on the left wing and cuts inside before lashing a shot at goal that goes wide of the post. He had better options inside, there.
18
This is like a totally different Real Madrid side from last week. There is intensity, there is tempo, there is spirit.
17
Bender and Gundogan really need to get into the game here. Xabi Alonso and Luka Modric are having the freedom of the pitch to spray balls around.
16
Dortmund just have not settled at all here. Schmelzer, in particular, is looking really susceptible at the back. They need to get their head in the game, and quick!
15
It is indeed bad news for Dortmund. Mario Gotze has had to go off, and he'll be replaced by Kevin Grosskreutz.
14
Mario Götze 
Kevin Großkreutz
14
MESUT OZIL!!! WHAT A MISS!! The German runs through on goal and has all the time in the world to pick his spot, and ends up dragging his shot wide of the right-hand post! How are Real Madrid not leading here?!
13
RONALDOOOO!!! OHHHH WHAT A SAVE!!! The Madrid man takes a superb chested touch before rifling a volley at goal, but Weidenfeller once again gets off his line to make a big, big save!!
12
Some worrying scenes for Dortmund now as wonderkid midfielder Mario Gotze is currently receiving treatment on the sidelines. He's clutching his hamstring. Not good.
11
HIGUAIN!! Wait, offside! The Madrid man earns a free kick on the right wing and then gets on the end of the resulting set-piece to power a header at goal. It goes wide, and the linesman puts up his flag. It did indeed look like he was ahead of play.
10
An absolutely breathtaking opening 10 minutes in Santiago Bernabeu. Dortmund have been able to burst out of their own half a few times but, for the most part, it has been all Madrid.
9
RONALDO!!! First chance for the former Manchester United man! Ozil, who has made a bright start, slides the ball inside to the Portuguese who smashes a strike over the bar from 16 yards. A lot of warnings being given to the Germans here!
8
Dortmund need to settle themselves down a bit! Subotic nearly causes a calamity as he slices the ball towards his own goal from inside the box! Luckily for him it goes out for yet another corner kick.
7
Madrid have already had two or three corners in the match, but each time Dortmund have done well to deal with the aerial threat. Madrid turning up the heat in the early stages!
6
Piszczek typically drives down the right-hand side and flashes a cross into the Madrid box, which is eventually cleared. The pressure is taken off the hosts when Sergio Ramos is cheaply fouled.
5
HIGUAIN!!! MADRID SHOULD BE AHEAD!! Ozil squeezes the ball through to the Argentine, who turns and blasts the ball off the oncoming Weidenfeller from seven yards out! Terrific goalkeeping, but that was a real chance!
4
Vital interception from Hummels!! Ozil turns sharply just in front of the Dortmund box and looks to slide a pass down the inside-right channel for Higuain, but the German manages to stick out a leg to block the ball!
3
Weidenfeller takes a little longer than he should to take a goal kick, and the Madrid fans shower him with a sea of roaring boos! Bit early for that, Roman!
2
What a fantastic atmosphere inside the Santiago Bernabeu! Madrid will certainly need their fans tonight, who are certainly making their voices heard!
1
We are under way in Madrid!
The Champions League theme sounds out in the Santiago Bernabeu, we are almost ready!
BVB have surrendered a three-goal first-leg lead before. It was in the 1987/88 UEFA Cup third round against Club Brugge KV. Probably not what their fans wanted to hear!
The Spanish side can also take heart from the following, very interesting stat...
A place in the Champions League final at Wembley is the prize for the winner tonight. It is quite a deficit for Madrid to overcome, but their free-scoring forward line just adds a smidgin of doubt to Dortmund's progression.
As you all know, though, Madrid have their own superstar goalscorer. Ronaldo has scored in each of his last six Champions League games, equalling the record by Marouane Chamakh and Burak Yilmaz.
Robert Lewandowski became the first player to score four goals against Madrid in the Champions League in the first leg. You wouldn't bet against him netting again tonight!
BVB lost at this stage of the competition to Real Madrid in 1998, with the Spaniards going on to win the competition.
Los Blancos lost to German opposition - Bayern Munich - in last season's semi-finals. This is the third straight year that they have reached this stage.
Real Madrid are bidding to reach their 13th European Cup final. The last time they lost in the showpiece was in 1981.
Don't forget to post your thoughts, feelings, and predictions on the match on to Twitter and the chat section of our Live Match Centre. You can follow Goal.com International on Twitter at @goal_intl and you can follow yours truly at @MartinMac1.
Unless you are a Madrid fan, last week was an absolute footballing treat. I think we can expect more of the same tonight!
Borussia Dortmund (4-2-3-1): Weidenfeller; Piszczek, Subotic, Hummels, Schmelzer; Bender, Gundogan; Blaszczykowski, Gotze, Reus; Lewandowski.
Real Madrid (4-2-3-1): Diego Lopez; Varane, Ramos, Coentrao, Essien; Xabi Alonso, Modric; Cristiano Ronaldo, Ozil, Di Maria; Higuain.
TEAM NEWS.
However, Cristiano Ronaldo's first half goal in that match has just added that little bit of edge to the match tonight. A 3-0 victory sees Jose Mourinho's men progress. Can they do it? Or will Dortmund progress to their first Champions League final since 1997, when they were victorious over Juventus.
Last week, Dortmund shook the foundations of football when Robert Lewandowski netted an incredible four goals to see the German side on their way to a superb 4-1 first leg victory over Madrid at the Westfalenstadion.
I'm Martin Macdonald, and it's my real pleasure to take you through the action this evening!
Good evening folks! Welcome to Goal.com's LIVE coverage of the Champions League semi-final second leg clash between Real Madrid and Borussia Dortmund at Santiago Bernabeu!