Hello and welcome to Sports Mole's live text commentary of the Champions League last-16 second leg between Borussia Dortmund and Benfica.

So Real Madrid and Bayern Munich are through to the quarter-finals of the competition, and tonight two more teams will join them. At the Signal Iduna Park, we'll find out if either Dortmund or Benfica will be in the last eight, and then either Paris Saint-Germain or Barcelona from their second leg at the Camp Nou.

The Portuguese giants, who currently sit top of the Primeira Liga, travel to Germany with a one-goal advantage, courtesy of Kostas Mitroglou's strike in Lisbon's first leg.

Benfica head coach Rui Vitoria masterminded a great performance from his side at the Estadio Da Luz, defending stoutly and keeping their opponents at bay right until the final whistle, although it has to be said that Dortmund simply did not have their shooting boots on that night, with Pierre-Emerick Aumabeyang putting in a particularly sub-par performance.

Thomas Tuchel's charges were not having a particularly good run of things at the time, lacking consistency and following up wins against difficult opponents with draws and losses against lower-heralded opponents, but in the last few weeks they have successfully addressed both their topsy-turvy results and their efficacy in front of goal - they have won their last three Bundesliga games by the following scorelines: 3-0, 3-0, and 6-2.

But if we're talking domestic form, Benfica win that head-to-head comfortably. They've won the last five Primeira Liga games on the trot, and have emerged victorious in eight of their last 10, drawing one and losing one (though that loss came against a fairly modest Vitoria Setubal side).

Without further ado, let's bring you the team news from the Signal Iduna Park.

DORTMUND STARTING XI: Burki, Bartra, Dembele, Aubameyang, Pulisic, Sokratis, Piszczek, Castro, Schmelzer, Weigl, Durm

BENFICA STARTING XI: Ederson, Nelson Semedo, Luisao, Lindelof, Eliseu, Andre Almeida, Samaris, Pizzi, Cervi, Salvio, Mitroglou

So Tuchel makes two changes from the side that thrashed Bayer Leverkusen 6-2 at the weekend. Christian Pulisic replaces Marco Reus, who has been ruled out with a thigh injury, and Marcel Schmelzer is drafted in for Raphael Guerreiro, who failed a late fitness test.

Dortmund, who sit third in the Bundesliga, are also without long-term absentees Sven Bender, Sebastian Rode and Mario Gotze, who has been ruled out indefinitely with a metabolic disorder.

Tuchel has lined his side up in a 5-4-1 formation, with Schmelzer and Erik Durm as wing-backs, a central three of Sokratis Papastathopoulos, Marc Bartra and Lukasz Piszczek, a midfield four of Pulisic, Gonzalo Castro, Julian Weigl and Ousmane Dembele, and Aubameyang, who will be more determined than ever to make up for his disappointing display last time out against Benfica, as the lone striker leading the line.

Vitoria also makes two changes for the visitors, with Andrija Zivkovic and Andre Carrillo missing out for the visitors to sit on the bench, while Nelson Semedo and Franco Cervi come into the side, who are looking for their eighth consecutive victory in all competitions.

Benfica appear to be in a 4-2-3-1 formation - a back four of Eliseu, Victor Lindelof, Luisao and Nelsinho; a central midfield duo of Andre Almeida and Andreas Samaris; a trident of Franco Cervi, Pizzi and Toto Salvio just ahead; and the lone striker in Mitroglou, who will be hoping to add to his goal in this tie.

Tuchel has confirmed that he wants his side to concentrate on attack tonight. He told a press conference: "If I were the coach of Chelsea, Juve or Atletico, maybe I would come up with a different answer. But when the floodlights go on tomorrow night in Dortmund and all the people will support us, then it is about attacking. We feel ready to go through. We have the feeling we can do it and it's the right moment to do it now. We feel the spirit in the team and the team knows it is capable of scoring lots of goals."

In response, Vitoria acknowledged his opponent's intention and claimed that he is more than prepared for what they are up against. He said: "We are not worried about others. Our focus is on us and what we have to do. Every game at this stage is a final for us. The pressure on Benfica is normal and it has to be this way. The truth is we won 1-0. We did things which we can do better, but we did not play against just any team. There are aspects of our game which, when improved, can cause more danger. We know our goal will have an impact. We know that Dortmund will play in their home and look for what they want... the win. But we are prepared for this and for different approaches during this challenge. Our concentration levels need to be very high. We are ready to face and win the tie."

Juicy talk from both managers, who want to go for the win. Will tonight be a feast of swashbuckling football, or will both sides try and suss each other out before cancelling each other out? Just over 20 minutes until kickoff here at the Signal Iduna Park.

HEAD TO HEAD: Obviously we know that the first leg of this tie finished 1-0 to Benfica, but these two sides' only previous encounter was in the 1963-64 European Cup first round. Dortmund lost 2-1 in the first leg, but won 5-0 in Germany to win the tie. Could it be an omen? Benfica will hope not, especially given their track record with the supernatural...

Dortmund have in fact won all four of their home games against Portuguese clubs in the European Cup/Champions League, scoring 11 goals and conceding two.

Meanwhile, Benfica have lost all nine of their away games against German clubs in the European Cup/Champions League, scoring four goals and conceding 26.

Now for some brighter stats for Benfica fans... only 30 percent of teams that have lost 1-0 away from home in the first leg of a Champions League knockout game have gone on to qualify.

Dortmund have lost seven of their last nine games in the Champions League knockout stages, while Benfica have a decent record at this stage, looking to reach the quarter-finals for the third time in six seasons.

As for Aubameyang, he has yet to score in his seven Champions League knockout games, while Mitroglou has scored in each of his last six Champions League campaigns - he's the top Greek scorer in the history of the tournament with 14 goals.

PREDICTION: Just over five minutes to go until kickoff in Dortmund, so it's time to me to predict the scoreline. On paper, Dortmund are the better side, and they seem to have overcome their earlier blip, but I have a sneaking suspicion that it'll end 2-1 to the hosts and Benfica will sneak through on away goals.

Schmelzer and Luisao lead the two teams out of the tunnel at the Signal Iduna Park.

KICKOFF! Referee Martin Atkinson blows his whistle and Benfica get the action underway!

Dortmund are in their traditional yellow and black, while Benfica are in red and white. Both of these sides, let's not forget, are former European Cup winners.

Benfica launch an early counter and Semedo looks to go forward on the right side, but Dortmund have men back to clear the danger.

Well then! Dortmund get off to the perfect start and Aumabeyang makes up for his poor display in the first leg by drawing first blood just four minutes into the second leg! Game on!

The Gabon star is in the right place at the right time as he nods home at the far post following Pulisic's near-post headed flick-on from Dembele's corner.

CHANCE! The momentum is now with Dortmund as Dembele marauds down the left channel, but Semedo manages to get ahead of him to see the ball out for a corner, and the set piece is headed over the bar by Bartra.

Another ball into the box from the impressive Dembele which nearly reaches the feet of Pulisic, but Luisao is on hand to hack clear.

CHANCE! Now Benfica threaten and force a corner as Schmelzer heads the ball low following a dangerous attack and, from Pizzi's set piece, the visitors appeal for handball but it's waved away, and Dortmund break with speed through Dembele, who cuts in from the left before unleashing a strike towards goal, but it flies just wide!

Benfica have not seen much of the ball in the opening quarter-hour, as Dortmund have so far made good on Tuchel's promise to attack their opponents into submission - Pulisic, Aubameyang and Dembele all causing havoc with their pace and movement as Durm is deemed to be offside after trying to get to a ball over the top.

Dortmund continue to look dangerous as they exploit the left side once again, but Aubameyang is half a yard offside as he tries to reach a Dembele through-ball.

Another update, another Dortmund attack, but this time goalkeeper Ederson is alert to claim a ball over the top destined for Aubameyang.

Dembele is brought down by Samaris and a free kick is awarded to Dortmund, though the Benfica man is not booked, while little is made from the set piece as Eliseu clears.

A good Benfica foray down the left finds Eliseu, but his cross is poor and Schmelzer heads clear.

CHANCE! Benfica finally give Burki a bit of a test as Pizzi, Salvio and Semedo connect well before the ball is crossed into the box by the latter, it finds Cervi on the left side of the box and he goes for goal but the Dortmund stopper is able to claim.

Now Dortmund are back applying pressure, but Semedo heads clear a crossfield ball intended for Schmelzer and snuffs the move out.

BOOKING: Almeida goes down in some pain after a studs-up tackle from Castro, who gets a yellow card for his troubles.

CHANCE! From the ensuing free kick, Pizzi finds the head of captain Luisao, who nods powerfully towards goal but unfortunately for him it's straight into the hands of Burki.

BOOKING: Now Samaris is shown a yellow after cynically knocking down Dembele as the Dortmund youngster tried to break.

Weigl fouls Pizzi near the centre circle and Benfica win a free kick, but nothing comes of it.

Nearly a disaster for Dortmund as Castro slips in the box allowing Semedo to try and take advantage, but Bartra is there to clear the danger.

BOOKING: Dembele fouls Eliseu and ends up getting a yellow card for protesting the decision to stop play. Cervi takes the free kick but it's too heavy and bounces wide.

Moments after being booked, Dembele launches into another foul, a studs-up challenge against Eliseu, but Atkinson decides against showing another yellow, much to the bemusement of the Benfica bench.

CHANCE! Schmelzer crosses from the left and Pulisic finds space on the edge of the box, he goes for an audacious header but from that distance he fails to get the necessary power and Ederson claims.

Piszczek fouls Cervi to gift Benfica a free kick, Pizzi takes and Mitroglou heads back across goal, but Sokratis clears.

PENALTY SHOUT! Eliseu clips the heel of Aubameyang just outside the box, but nothing is given by Atkinson as one minute of added time is announced.

Half time at the Signal Iduna Park and Dortmund are a goal up against Benfica, and when Pierre-Emerick Aubameyang struck after just four minutes, it looked like we may have had a rout on our hands, but the visitors have grown into the game and tested their opponents on numerous occasions.

It's on a knife edge right now, with the aggregate score poised at 1-1. If things stay as they are at the final whistle, it's extra time. Benfica score just once, and Dortmund will have to score twice to qualify.

In tonight's other Champions League game, it's Barcelona 2-0 PSG. Could the comeback of all comebacks be on at the Camp Nou? They're halfway to overturning the 4-0 first-leg deficit, but of course, if the visitors get an away goal... it's tense. It's all very tense.

In the last 28 UEFA matches in which Dortmund have scored first, they have won on 26 occasions and lost just once... #UCL pic.twitter.com/Ih1O4Q8rF2

— Champions League (@ChampionsLeague) 8 March 2017

Dortmund have had six shots (two on target), completed 245 passes with an accuracy of 87 percent, and enjoyed 58 percent possession.

Meanwhile Benfica have had three shots (two on target), completed 148 passes at 76 percent accuracy, and had just 42 percent possession. However, they're still very much in the tie.

So which way will it go? Will tonight's scoreline stay the same and go to extra time and maybe even penalties? Or will one side strike in this second half and ensure it will be settled in 90 minutes? Sports Mole is on hand to bring you all the action as it unfolds!

KICKOFF: Dortmund kick off the second half.

CHANCE! So close for Benfica as Cervi picks up a loose ball on the edge of the area, takes a touch to set himself up, and lashes a ferocious effort towards goal, only for Piszczek to throw himself in the way and deflect it behind!

CHANCE! Eliseu brings down Dembele to gift Dortmund a free kick, Castro delivers and finds Aubameyang on the left-hand side, he goes for a bicycle kick but it sails just wide!

CHANCE! End-to-end stuff as Benfica win a corner and Pizzi picks up possession before going for goal, but it heads high above the bar.

CHANCE! So close! Piszczek nods a free kick into the path of Aubameyang, who shoots from point-blank range, but Ederson flings himself across goal and keeps it out!

Barcelona are three up at the Camp Nou against PSG. 3-4 on aggregate.

CHANCE! Pulisic makes a great run forward and picks out the run of Aubameyang, but Ederson is there to bravely save with his face - it's offside anyway.

Dortmund kept knocking, Ederson kept saving, but now it looks as if Benfica are out of contention after two quickfire goals by the hosts!

Ederson had brilliantly kept out Aubameyang but the ball fell to Piszczek at the top of the box, who played in Pulisic down the right-hand side, and the American chipped over the goalkeeper and into the net, then two minutes later, Schmelzer drilled a precise cross into the six-yard box, where Aubameyang was waiting to rifle home.

SUBSTITUTION: A change for Benfica, who have to score twice now to go through, as Eduardo Salvio walks off the pitch and Jonas comes on.

BOOKING: A cynical foul from Piszczek sees the Polish defender go into the book.

CHANCE! Another Dortmund attack as Aubameyang gets away down the right flank and sends a cross past Dembele and into the path of the oncoming Castro, who fires on the half-volley but ends up blasting wide.

Benfica win another free kick which Pizzi sends into the box towards Luisao, who forces another corner with a header which gets deflected behind, ultimately it's cleared though.

Dortmund have now scored 24 goals in their eight Champions League matches this season, and have scored 15 in their last four games in all competitions, including this one. Tuchel did say they would attack...

SUBSTITUTION: Dembele is hauled down by Samaris but there is no second booking from Atkinson, and moments later Vitoria withdraws the tightrope-walking Greek midfielder and brings on Andrija Zivkovic.

Just over 10 minutes left to play plus added time, is it enough for Benfica to strike twice and snatch away what appears to be imminent quarter-final qualification for Dortmund? In all fairness, the visitors are struggling to get out of their own half...

Schmelzer's throw-in is flicked into Dembele's path by Aubameyang, but Atkinson brings back play for offside.

SUBSTITUTION: Dembele's shift comes to an end as Shinji Kagawa replaces the cramp-stricken 19-year-old for the final ten minutes of this game.

SUBSTITUTION: Benfica make their final change of the evening as Cervi is replaced by Raul Jimenez.

OFF THE POST! Castro's corner into the box finds Bartra, who rises high and gets a head on it, but the ball cracks against the upright before going wide!

What better way to answer your critics than by going out there and scoring a hat-trick? That's exactly what Aubayemang's done after his flat first-leg display, bagging goal number three of the evening as Castro sets Durm free down the right of the box, before a cross is swung in and turned home by the high-flying striker.

SUBSTITUTIONS: Two more changes for Dortmund as the stellar Aubameyang and Sokratis are replaced by Schurrle and Ginter to see this game out.

We have three minutes of added time tonight at the Signal Iduna Park. Just a formality really, with the result all but certain.

That's that then! Ultimately it's comfortable for Dortmund, whose clinical finishing has seen them claim a 4-0 win over Benfica to reach the quarter-finals of the Champions League!

Aubameyang struck early to give the hosts the perfect start, but Benfica grew into the game and threatened on a number of occasions before two quickfire goals by Dortmund deflated the visitors, and five minutes from time, the Gabon star completed his hat-trick and rubber-stamped the outcome of this tie.

That's all we have time for here in Dortmund but don't go anywhere because Sports Mole is on hand to bring you match results, reaction (and believe me, there will be plenty, especially from the Barcelona game, 5-5 on aggregate at the time of writing) and all the latest news from tonight's action! Thank you for following and, until next time, goodbye!