Anyway, that's all from me, Ameé Ruszkai, and us here at VAVEL UK for our live commentary of tonight's game between Dortmund and Liverpool. Stay tuned for reports from tonight's Europa League action, as well as reaction from ourselves and the players and coaches. Thank you for joining us!
The rest of the ties are still well open too, with away goals scored in all. Shakhtar Donetsk and Sevilla have both won 2-1 on the road at Braga and Athletic Bilbao respectively, meaning they going into their home legs with a huge advantage. Villarreal, meanwhile, are 2-1 up from their home leg with Sparta Prague, but will be keen on an away goal of their own just to be sure next week.
The return leg at Anfield in a week's time promises to be an interesting match then, as Dortmund will need to come out and attack while Liverpool look to ensure passage to the semi-finals.
Full time! Origi's opener is cancelled out by Hummels' header, but it goes without saying that the result is better for Liverpool. 1-1 is the final score.
90 - Sokratis on thin ice despite only being on for less than 15 minutes as he fouls Coutinho. Nothing malicious but needs to be careful and make that his last as two minutes are added on.
86 - Sturridge is immediately on the ball and his nice footwork takes him into the area, but he's eventually crowded out and Dortmund clear.
84 - Change up top for Liverpool as Sturridge replaces Origi.
81 - Castro tries to bend the ball into the far corner, but Mignolet parries the shot away from danger with a smart save. Meanwhile, Sokatris is into the book already after hacking down Origi who was looking to break.
80 - Moreno flies in ridiculously with two feet off the ground and doesn't get a yellow. Clearly wins the ball, but gets a ticking off from the referee for how he does so. Lucky not to get a yellow, which would have seen him miss the second leg.
78 - Liverpool now make a change of their own as Firmino, recently back from injury, replaces Lallana.
77 - Double change for Dortmund as Sokatris replaces Bender, who has just returned from injury, while Pulisic has come on for Aubameyang.
75 - The game is slowly trickling into it's final stages in Dortmund with little happening. The hosts running out of ideas as the Reds look to catch them on the break, albeit seemingly happy to take the 1-1 draw at this point.
64 - Sakho to the rescue once more! He blocks as Reus looks to flick the ball up to strike in the box.
59 - Schmelzer darts forward and wins a free-kick just outside the box after being brought down by Lovren. Very good position for Dortmund this. Reus hits it, but Mignolet holds.
57 - Things have quietened down a bit now since those crazy few minutes as Sahin's shot is easily saved by Mignolet.
52 - And more saves! Weidenfeller scoops away Clyne's long range effort before then denying Coutinho again! Meanwhile, Reus is booked for a foul on Clyne.
51 - What a save! Weidenfeller brings out a splendid stop to deny Coutinho as he powerfully fires goalwards just inside the area!
Nightmare start to the second half for Liverpool as Hummels powers in a bullet header on just 48 minutes. Poor defending by the Reds, who failed to pick up the German international, giving him a free run at the delivery.
GOAL! DORTMUND EQUALISE!
As we do kick back off, Bilbao have just taken the lead against Sevilla in Spain! Aduriz continues his fine scoring form by bagging that opener.
We're about to kick back off at Dortmund and both teams have made changes. Liverpool have swapped Henderson for Allen, and Dortmund have swapped Durm for former-Liverpool loanee Sahin. Durm took a blow to the head at the end of the first half, which could be the reason behind the latter change.
Back to Spain; Villarreal are drawing 1-1 with Sparta Prague. The hosts took the lead after just three minutes through Cédric Bakambu, but Jakub Brabec equalised in stoppage time against the run of play for Sparta.
In Portgual, Braga trail 1-0 to Shakhtar Donetsk. Yaroslav Rakitskiy got the goal on the stroke of half time, volleying in from a corner.
In Spain, the all Spanish affair is goalless between Athletic Bilbao and holders Sevilla. That's the only game without a goal at half time.
Let's take a quick trip around the grounds in Europe at the break then.
And that's half time. Thrilling end to the half as Liverpool take their 1-0 lead in at the break.
45+4 - What a chance! Origi is played through on goal but Weidenfeller stands up and saves brilliantly (before talking his way into the referee's book...)!
45+3 - What a block! Mkhitaryan threads in Aubameyang who looks to flick in it for the equaliser, but Lovren blocks brilliantly! Reus then almost scores at the back post from the resulting corner, but Mignolet saves!
45 - There will be four minutes of added time, and the first sees Mignolet save Durm's speculative effort.
44 - Muted response by Dortmund so far as Lallana picks up a booking while pressing high. Nearly half time; looks like Liverpool will take this lead in at the break.
40 - Great move on the right through Clyne sees Liverpool break through into the area, but two attempted shots are blocked by the stern Dortmund defence.
39 - Liverpool have their tails up now and Coutinho goes down as he bursts into the box with Piszczek brushing him off the ball. Minimal contact and thus unsurprisingly muted shouts for a spot kick.
Almost against the run of play as, after a string of chances for Dortmund, the ball falls to Origi who resists his marker well with his strength before arrowing home the opener. Crucial away goal for the Reds!
GOAAAAAL! LIVERPOOL! ORIGI BREAKS THE DEADLOCK!
36 - Mkhitaryan given licence to run with the ball again and he slides it over the Aubameyang as Henderson slips, but the striker's effort is comfortably saved by Mignolet.
34 - Chance! Mkhitaryan is given all the space in the world to run into and opts to shoot as no-one closes him down, but slips as he does and his effort from the edge of the box trickles wide.
33 - Liverpool a bit sloppy on the ball so far - particularly in their own half. Most of Dortmund's attacks coming from their defence. Fortunately, they haven't been punished properly yet.
31 - Aubameyang breaks down the left and looks to square to Reus, but Sakho sticks his leg out to thwart the attack. Mignolet deals with the resulting corner.
30 - The Gabon international sees his effort deflected wide and Dortmund take the corner short, only for Milner to clear for a throw.
29 - Free-kick in shooting range for Dortmund now as Sakho brings down Reus. Aubameyang looks to take it.
28 - Liverpool corner is punched clear by Weidenfeller but only as far as Moreno. Fortunately for the 'keeper, his effort from the edge of the box sails over.
27 - Castro catches Milner on the follow through and it's a Liverpool free-kick. They play it short though and eventually lose to ball to Dortmund's defence.
24 - A change of shirt required by the Dortmund 'keeper, but he is up and fine to continue.
22 - Weidenfeller now down receiving treatment after that clash with the two Reds, with blood coming from his mouth it seems.
21 - Reus dives in when tracking back as Clyne darts forward and gives Liverpool a free-kick. The delivery from Milner is good but Lovren's header is right at the 'keeper, who is then fouled on the follow up by both Lovren and Lallana.
17 - Dortmund should score! The ball is cut back into Liverpool's box by Schmelzer where there are a sea of yellow shirts, but some heroic defending by Sakho thwarts Mkhitaryan as he looks to finish into an empty net!
16 - Poor delivery but the ball finds Reus on the edge of the box and he drags a shot wide.
15 - Mkhitaryan caught by Milner on the left wing - good position for a free-kick for Dortmund this.
9 - Cross eventually goes in towards Coutinho but is cleared, and then Can fouls Mkhitaryan as Dortmund looked to break and picks up an early booking.
8 - Free-kick in a decent position for Liverpool but they restart quickly to knock the ball around Dortmund's box.
5 - Dortmund enjoying more of the ball so far, but they've not done anything with it in an uneventful opening few minutes.
Kick-off just moments away as 'You Never Walk Alone' rings out around the ground.
Meanwhile, Hummels returns for Dortmund, while Sokratis is fit enough for the bench.
That's that then, the standout news from either team is surely that Daniel Sturridge doesn't start for Liverpool, Divock Origi preferred for tactical reasons. Roberto Firmino is fit enough to get back and make the bench, but not to start.
Liverpool subs: Ward, Toure, Smith, Allen, Ibe, Firmino, Sturridge.
Dortmund subs: Burki, Ginter, Sokratis, Sahin, Leitner, Pulisic, Kagawa.
Liverpool XI: Mignolet, Clyne, Lovren, Sakho, Moreno, Can, Henderson, Milner, Lallana, Coutinho, Origi.
Borussia Dortmund XI: Weidenfeller, Piszczek, Hummels, Bender, Schmelzer, Castro, Weigl, Durm, Mkhitaryan, Reus, Aubameyang.
We've got the all important team news in folks, with just an hour to go until kick-off in Germany!
Predicted Liverpool XI (4-4-1-1): Mignolet; Clyne, Lovren, Sakho, Moreno; Lallana, Henderson, Can, Coutinho; Firmino; Sturridge.
Predicted Dortmund XI (4-2-3-1): Weidenfeller; Piszczek, Sokratis, Hummels, Schmelzer; Weigl, Castro; Durm, Mkhitaryan, Reus; Aubameyang.
With Klopp perhaps the best suited to thwarting a dominant Dortmund but Liverpool's ability to do so perhaps questionable, this promises to be an intriguing affair in which tactics and out-right quality will both be key.
Their other meeting was a friendly back in 2014, which took place when Klopp was still at Dortmund's helm. With plenty of players still absent after their 2014 FIFA World Cup exploits, particularly those who won the tournament with Germany, Dortmund were depleted and it showed as the Reds raced to a 4-0 win.
This will be just the fourth meeting between these two clubs in their histories, and just the third competitive one. The other two came back in 2001 in the 2001-02 season's Champions League when the two clubs were put in Group B together. Liverpool topped the group with 12 points; four of which were picked up against Dortmund. After a goalless draw in Germany, the Reds managed a 2-0 win on home soil, with Vladimir Smicer and Stephen Wright the scorers on the night.
Meanwhile, there are eight players who will need to watch their step tonight - many of them defenders who their opponents will be looking to tease into a foul. Any yellow cards for Coutinho, Firmino, Dejan Lovren, Alberto Moreno or Nathaniel Clyne - for Liverpool - will equate to their absence for the second leg through suspension, and the same goes for Dortmund trio Hummels, Bender and Julian Weigl.
Meanwhile, Divock Origi is back fit after coming off the bench on Saturday, but Christian Benteke will be out for a month with a knee injury. Klopp will hope Firmino is back then, as he can give the team another attacking option on top of Origi and Daniel Sturridge.
Liverpool will hope their opponents are forced to field a makeshift back four though and will look to attack it with everything they've got. They will hope to welcome back Roberto Firmino at the same time, who has been out since mid-March with a hamstring problem. The forward missed the Southampton clash before dropping out of Brazil's squad during the break, and he was also absent for the Spurs game last time out. However, he is nearing his return and could be back in time for this clash.
Thomas Tuchel will hope that Hummels' restoration to the XI tonight can help them look a little more secure, but the Germany international is reported to have come down with illness himself that could see the partnership of Bender and Ginter forced to resume in the heart of defence. Still, he and Sokratis were able to train on Tuesday, as was long-term absentee Ilkay Gundogan, who has been out for some time with a foot injury.
With Mats Hummels given a deserved rest, Dortmund looked fragile against a struggling Bremen side. Sven Bender's return from a knee injury saw him thrown into a centre-back role, while Matthias Ginter was forced to play alongside him in a position he hasn't operated in since August.
The Merseysiders will be boosted by Dortmund's defensive woes lately, with them missing Neven Subtobic until the end of the season due to thrombosis in his arm while Sokratis Papastathopoulos was forced to miss Saturday's game through illness and is a doubt for tonight.
Nine points off the top four with seven games to play, one would expect Klopp to really start putting all the Reds' eggs in this European basket as they pursue silverware and passage to the next level of European football - which would be a real achievement in his debut season, especially with it not even a full season for him.
Nonetheless, while Dortmund are seemingly guaranteed a spot in the Champions League next season - 22 points inside the top four with eight games to go - Liverpool's best hope of securing a place in Europe's elite competition is through winning the Europa League.
Their latest victory came at home to Werder Bremen on Saturday, with them recovering from 2-1 down to win 3-2 late on. Liverpool, meanwhile, had to settle for a 1-1 draw at home to Spurs, with them leading through Philippe Coutinho only to see Harry Kane level things up only 12 minutes later.
However, it's Dortmund who come into this game on the real high. Their passage into this round was very emphatic, seeing them dispatch title-chasing Tottenham Hotspur with ease, while their domestic form reads 11 games unbeaten - nine of them wins, the other two draws against fellow high-flyers Bayern Munich and Hertha BSC.
Klopp has already tasted a mixture of highs and lows on Merseyside. Losing the League Cup final to Manchester City on penalties in February and being knocked out of the FA Cup late on against West Ham United gave him the latter; while success over Manchester United in the previous round of this competition was certainly a high.
The German left the club at the end of last season after a relatively disappointing campaign, unable to secure silverware in his final game - a 3-1 loss to VfL Wolfsburg in the DFB-Pokal final, and then joined Liverpool midway through the current season after the sacking of Brendan Rodgers.
This tie is easily the biggest of the four quarter-finals simply due to the fact that it sees Jürgen Klopp return to face his old side. Klopp spent seven years with Dortmund between 2008 and 2015, winning two Bundesliga titles, two DFL-Supercups and the DFB-Pokal, as well as guiding them to the 2012-13 UEFA Champions League final.
Hello and welcome to VAVEL UK's live coverage of tonight's UEFA Europa League quarter-final clash between Borussia Dortmund and Liverpool. My name is Ameé Ruszkai and I'll be taking you through this evening's first leg, which will take place at Signal Iduna Park, Dortmund. Kick-off is scheduled for 20:05BST.