Depay brings down Clyne for penalty
Firmino from six yards for second
De Gea makes series of superb saves
Return leg at Old Trafford on 17 March
Liverpool 2-0 Man Utd
Double change. Ander Herrera replaces Juan Mata, Bastian Schweinsteiger on for Morgan Schneiderlin.
The horse has bolted lads. It's away over the field, wearing a red shirt and carrying a two-goal lead...
Liverpool 2-0 Man Utd
The Kop is bouncing now as Liverpool and their fans sniff a third. They could end the tie tonight...
Liverpool 2-0 Man Utd
Liverpool deserve that second goal, they have been the better side throughout bar a strong 10 minutes after half time. Somebody has let off a red smoke bomb as the atmosphere at Anfield dials up a notch. United ready Germany captain Bastian Schweinsteiger. A man for a big occasion.
Liverpool 2-0 Man Utd
Kevin Kilbane
Ex-Everton and Republic of Ireland winger at Anfield for Radio 5 live
"That is such a big goal. Michael Carrick with a really poor clearance and Roberto Firmino just has a simple tap-in. Very poor defensively. There was nobody near Carrick but he mistimed his clearance, straight to Adam Lallana."
Image source, Reuters
Roberto Firmino
Michael Carrick. Lovely man, great spokesman, treasured and experienced midfielder. He's had a huge career.
But he's not a centre-back. And he shows it with some woeful defending as Liverpool grab a second.
Jordan Henderson crosses from the right, Carrick should just clear his lines but he tries to volley a tricky pass to a team-mate. He ends up cushioning it to Adam Lallana, and then compounds his error by chasing the ball and being out of position. Lallana finds Roberto Firmino, and he scores.
Big goal!
Image source, Reuters
Image source, ReutersLiverpool 1-0 Man Utd
Liverpool win a free-kick in a dangerous spot but Philippe Coutinho slips as he strikes the ball and it pings wide. Adam Lallana then pulls out the Zidane 'round-the-world' trick and it ends up with a corner. Liverpool now well back on top.
Liverpool 1-0 Man Utd
Kevin Kilbane
Ex-Everton and Republic of Ireland winger at Anfield for Radio 5 live
"Jordan Henderson tried to open his foot out and guide the ball into the top corner. On target and David de Gea would not have been getting there...
"Liverpool look so good when they don't dominate possession - they are excellent on the counter attack."
#bbcfootball
John Smith: Liverpool see the goal they shoot. Man U see it, they pass back.
Liverpool 1-0 Man Utd
Liverpool now have their foot back on the accelerator and have a good chance. Adam Lallana spins in behind his marker, cuts it back to Jordan Henderson striding on to the ball on the edge of the box, side-foot, first time - just wide!
Liverpool 1-0 Man Utd
What a strike that is! Nathaniel Clyne winds up from a good 25 yards out, wide on the right, and clatters a lovely hit, clean as you like and David de Gea has to punch that one away from danger! The TV cameras pick out Kenny Dalglish and then Sir Alex Ferguson in the stands. Royalty.
Image source, Reuters
Image source, AFP/GETTY#bbcfootball
Paul Gourley: Just another sign of negative tactics of Klopp, lucky penalty and it's been 10 men behind ball entire game.
Aadz: Fellaini will be seeing red soon! L, externalvG do the necessary before your hand is forced!
Rich Oylott: Oh. Martial is playing!
Villarreal are now 2-0 up at home to Bayer Leverkusen - is there any chance of Javier Hernandez turning the tie in the Germans' favour though?
Gary Neville's Valencia are still 1-0 down at fellow Spanish side Athletic Bilbao, while Sparta Prague and Lazio are locked in at 1-1 in the Czech Republic.
Liverpool 1-0 Man Utd
Daniel Sturridge hasn't seen much of the ball in the second half and he is hooked as Jurgen Klopp reacts to United's change of shape. On comes Joe Allen, with Sturridge predictably and understandably miffed as he takes his seat.
Image source, ReutersLiverpool 1-0 Man Utd
Phil McNulty
BBC Sport chief football writer at Anfield
"Signs of Manchester United twitching into life - but they are still relying so heavily on the magnificent goalkeeping of David de Gea.
"Liverpool still look dangerous and for the slight improvement in United, they have yet to create any chance of substance. It's been a miserable night for them so far."
Liverpool 1-0 Man Utd
Liverpool 1-0 Man Utd
Break, chance for Memphis Depay to burn some rubber and get United up the pitch but Alberto Moreno shows superb pace to get back and make the challenge.
Then the Dutchman does find a cute pass through but Anthony Martial can't gather it in.
Liverpool 1-0 Man Utd
Silly, rash challenge from Marouane Fellaini on the deadball line and he goes into the book. Half an hour to go in the first leg.
Image source, ReutersLiverpool 1-0 Man Utd
Kevin Kilbane
Ex-Everton and Republic of Ireland winger at Anfield for Radio 5 live
"With their extra centre-half Manchester United can keep the ball better across the back now, and Louis van Gaal's side are coming right back into the game.
"This is a quality cup match."
#bbcfootball
Ricology: As usual Liverpool didn't capitalize on their first-half dominance and will settle for a draw or a narrow win...
Liverpool 1-0 Man Utd
This has been as good as you get on a Thursday night. Compelling viewing, with Act II to come next week back down the East Lancs road.
For the whole of the first half it looked like Liverpool were destined to open up a comfortable lead but now United look a far better side.