Jones gets away from Pogba on the left and the Frenchman catches him from behind in his attempt to win the ball back and earns a booking.
90' +1
Into the first of four added minutes now and Liverpool are still seeing a lot of the ball. Milner plays it out to Alexander-Arnold on the right, but he's quickly closed down by Shaw and he has nowhere to go.
89'
V. Lindelöf gets yellow.
Lindelof is shown a yellow card after catching Origi with a late tackle.
88'
Fernandes breaks quickly for United before touching it out to Cavani on the left. He lifts a cross into the box, but it's just behind Pogba and Fred can't reach the loose ball before Robertson.
86'
A. Martial enters the game and replaces M. Rashford.
Another change for United now and it's Rashford that's making way for Martial.
85'
United have all their players back in their own half as they try to close down the space ahead of Liverpool. The visitors are keeping the ball well at the moment, but all of their possession is in front of United.
83'
Shaqiri's corner is cleared by the first man, but Liverpool keep the pressure on United. They switch it out to Milner on the left and he floats a good cross into the box, but none of his team-mates get on the end of it.
81'
D. Origi enters the game and replaces Roberto Firmino.
X. Shaqiri enters the game and replaces Thiago Alcântara.
Thiago is also making way, with Shaqiri on for him.
Double change for Liverpool now and Firmino is being taken off, with Origi replacing him.
80'
Fernandes plays it out to Wan-Bissaka and he drifts inside and isn't closed down as he gets to the edge of the box. He lifts the ball to Rashford at the far post and Alisson blocks the volley, but it wouldn't have counted anyway as he was offside.
Minute
Description
78'
Bruno Fernandes has scored a goal for Manchester United!
UNITED LEAD AGAIN! Fernandes steps up to take the free-kick and he lifts his shot over Thiago on the edge of the wall and curls it in at the far post and Alisson can't get there to stop it. 3-2 United!
77'
Fred scuffs his pass but it still finds its way through to Cavani on the edge of the box. He goes down under a challenge from Fabinho, and the Liverpool players are asking for a handball, but United have a free-kick on the edge of the area.
75'
McTominay gets a touch on Firmino's pass but he ends up giving it straight to Salah on the edge of the box. He takes it past Maguire before hitting a low shot down the middle, but it's straight at Henderson.
73'
Pogba can't reach Fernandes' throughball and Liverpool are straight on the counter. Alexander-Arnold drills a low cross into the box for Mane to chase, but Wan-Bissaka just does enough to stop him.
69'
S. Mané gets yellow.
Mane slides into his tackle on Fred and although he gets some of the ball, he catches the midfielder with his studs so he's booked.
66'
Fred enters the game and replaces M. Greenwood.
Bruno Fernandes enters the game and replaces D. van de Beek.
Double change for United now and it's Greenwood that makes way first, with Fred on for him.
Fernandes is also being brought on in place of Van de Beek.
64'
Shaw has space to run into down the left and he squares a low cross towards Van de Beek on the edge of the box. He gets caught on his heels though and he can't get to it before Williams.
62'
S. Mané enters the game and replaces G. Wijnaldum.
Klopp makes the first change of the game and he's bringing on Mane to replace Wijnaldum.
60'
Liverpool are pushing forward once again and finding a lot more space in behind United who can't get on the ball long enough to break out of their own half at the moment.
58'
Mohamed Salah has scored a goal for Liverpool! Assist by Roberto Firmino.
Firmino is played in by Milner on the left of the box and he plays a low cross into the Salah in the middle to set up another goal for him.
SALAH EQUALISES! It's a mistake from Cavani that sets Liverpool on the attack and United can't get close to them. It comes to Salah and he hits his shot into the back of the net from the edge of the six-yard box. 2-2!
56'
It's well-worked down the right by Liverpool and Salah pulls away from Shaw to lay it off to Firmino. He touches it onto the edge of the box, but none of his team-mates are there and Maguire clears his lines.
54'
Rashford makes a driving run down the right, but he's closed down by Robertson so he squares it infield to Cavani. He flicks the ball into Greenwood's path, but he can't find a way past Williams to get in on goal.
52'
Robertson has space to run into down the left again and Alexander-Arnold tries to switch play out to him. His first touch is poor though and he can't keep it in play to get a cross into the box.
50'
Liverpool are pushing forward now as they try to react quickly to United's goal. Robertson plays his cross to the edge of the box, but it's over everyone's heads and Salah can't keep it in play on the right.
48'
M. Rashford has scored a goal for Manchester United! Assist by M. Greenwood.
Greenwood plays his pass first time when he gets it from Cavani and it's a great ball into Rashford's path to set him on his run.
RASHFORD SCORES! Williams misses the ball when he tries to clear Greenwood's pass and it goes through to Rashford who has a clear run at goal. He curls it into the far bottom corner and Alisson gets a hand to it, but he can't keep it out. 2-1 United!
46'
Liverpool get us back underway for the second half!
45' +2
HALF-TIME: MANCHESTER UNITED 1-1 LIVERPOOL.
44'
Shaw drills a cross into the six-yard box and Alisson comes off his line to push it away. He only gets it as far as McTominay on the edge of the box and he hits a low shot towards goal, but Thiago has dropped back and clears it for Liverpool.
42'
Fabinho gets yellow.
Fabinho is shown the first yellow card of the game for his challenge on Greenwood and United have a free-kick just outside the box.
41'
Alexander-Arnold plays the ball back to Alisson and Cavani is quickly closing him down. He gets rid of it quickly, but the pass to Fabinho is short and Greenwood comes across to get it, but he's caught by him.
39'
McTominay wants too long on the ball and Jones nicks it off him. He plays it out to Robertson, and Henderson went to close him down as he cut it back from the byline. He's looking for Firmino at the far post, but Shaw heads it behind for a corner.
37'
Another corner for United now and it's Shaw that swings this one in. He picks out McTominay this time, but he gets caught under the ball and his header loops high over the bar.
35'
Shaw's free-kick is headed over by Williams, so the left-back goes across to take the corner. It's a good cross into Pogba on the edge of the box, but he heads his effort over the crossbar.
34'
Salah brings the cross down on the right of the box, but a heavy touch gifts the ball to Pogba. He plays a throughball into Rashford, who is running into space down the left, and he wins a free-kick when Thiago brings him down.
30'
United are struggling to find a way out of their own half at the moment as Liverpool continue to press them high upfield. Wan-Bissaka looks like he has room to run into down the right, but Milner is quickly across to dispossess him.
28'
Rashford makes a driving run down the left and slides his pass into Van de Beek from the edge of the box. He squares it across the box just as Alisson comes to close him down, but Thiago clears it in the middle.
26'
M. Greenwood has scored a goal for Manchester United! Assist by M. Rashford.
GREENWOOD EQUALISES! United break quickly on the counter and it's a great switch of play from Rashford to spot Greenwood's run down the right. He chests it down and hits the shot across goal and into the far bottom corner. 1-1!
Nobody closes Rashford down on the left and he has time to get his head up before playing a great ball over the top to pick out Greenwood on the edge of the box.
24'
Liverpool have a free-kick right on the edge of the box and it's Alexander-Arnold that steps up to take it. It's curling towards the near top corner, but there's not enough dip on it and it sails just over the bar.
22'
Pogba loses out to Firmino and he plays a first-time ball into Jones after winning it off the Frenchman. The space opens up for him and he takes the shot from range, but it's straight at Henderson down the middle.
20'
Liverpool are closing United down quicker when they don't have the ball now and Shaw can't find a way past Alexander-Arnold down the left wing, who then sets the visitors off on the counter.
18'
Mohamed Salah has scored a goal for Liverpool! Assist by Roberto Firmino.
Firmino gets his head up and spots Salah pointing to where he wants it played and plays a good throughball into his path.
LIVERPOOL LEAD! Salah drops away from Lindelof on the edge of the box, and Firmino plays him in. He's one-on-one with Henderson and he coolly chips his effort over the keeper and into the back of the net. 1-0 Liverpool!
16'
Liverpool are pushing forward again and Salah switches play out to Milner on the right. He tries to take it past Lindelof, but a heavy touch takes it away from him and the defender sees it out for a goal-kick.
14'
Cavani latches onto a loose ball and has a clear run to the Liverpool box. He has Rashford in support, but he chooses to play it out to Greenwood on the right. He wrongfoots Fabinho but fires his shot wide of the near post.
12'
It's patient play from Liverpool at the moment as they try to play out from the back, but they're struggling to find a way in behind United. Milner tries a throughball into Firmino, but it's cut out by McTominay.
10'
Greenwood picks up the ball on the halfway line and makes a driving run down the right and into the box. It's a tight angle at the near post when he sends it across though and Alisson gets his foot to it.
8'
Alexander-Arnold tries to play an early cross into the box, but he puts it behind Firmino through the middle. It looks like it might run through to Robertson on the far side, but Wan-Bissaka gets there first to clear his lines.
6'
Maguire plays a long ball over the top to try and pick out Cavani's run between the two Liverpool defenders. There's too much on it for him though and Alisson rushes out of his box to head it away from danger.
4'
Rashford makes a driving run into the box, but he can't find a way past Fabinho so he plays it out to Shaw on the left. He swings his cross towards Van de Beek at the near post, but Williams steps across him to intercept it.
2'
Robertson switches play out to the right and Alexander-Arnold drills a low cross into the box. Shaw gets a foot on it in the middle but gives it to Wijnaldum on the edge of the box and he hits his shot, but the left-back blocks it.
1'
Van de Beek gets the game underway for United!
Hello and welcome to live coverage of the FA Cup fourth-round meeting between Manchester United and Liverpool at Old Trafford!
MANCHESTER UNITED STARTING XI (4-2-3-1): Dean Henderson; Aaron Wan-Bissaka, Victor Lindelof, Harry Maguire, Luke Shaw; Paul Pogba, Scott McTominay; Mason Greenwood, Donny van de Beek, Marcus Rashford; Edinson Cavani.
MANCHESTER UNITED SUBS: David de Gea, Nemanja Matic, Daniel James, Axel Tuanzebe, Anthony Martial, Juan Mata, Alex Telles, Fred, Bruno Fernandes.
LIVERPOOL STARTING XI (4-3-3): Alisson; Trent Alexander-Arnold, Rhys Williams, Fabinho, Andy Robertson; James Milner, Thiago, Georginio Wijnaldum; Mohamed Salah, Roberto Firmino, Curtis Jones.
LIVERPOOL SUBS: Sadio Mane, Nathaniel Phillips, Takumi Minamino, Konstantinos Tsimikas, Xherdan Shaqiri, Neco Williams, Divock Origi, Alex Oxlade-Chamberlain, Caoimhin Kelleher.
The teams are out on the pitch now, with kick-off just moments away.
It's been just one week since the teams last met and played out a 0-0 draw at Anfield. United come into this game having gone unbeaten in their last four in all competitions (W3 D1), which includes a 1-0 win over Watford to get through to this round. As for Liverpool, they've won just one of their last six in all competitions (D3 L2), which was a 4-1 victory over Aston Villa in the third round.
Both sides looked dangerous going forward in the first half, but Klopp will be expecting an improvement from his side in the final third as they haven't tested Henderson too often. United have had more shots on goal, but Alisson hasn't had much to do either. Solskjaer will expect his side to be much more clinical after the break.
That means that United will face West Ham in the fifth round at Old Trafford. Their attention turns back to the Premier League before that though as they face Sheffield United on Wednesday. Liverpool are now without a win in three as their focus is back on the league and they have a tough test against Tottenham as they look to bounce back.
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