Michael Reid: Trent has been heavily involved in all good things for Liverpool this evening and its clearly down to the fact United aren't playing with a left winger. United are literally allowing him to free roam without making him defend.

Michael O'Neill: Dean Henderson is, by all accounts, a driven individual with a very strong belief in his ability. Good luck to him, but he’s not destined to be United’s long-term No. 1. He just doesn’t ‘look the part’. Sadly.

Manchester United need to make some changes, surely? They are giving it away far too easily in the middle and Liverpool are starting to cut through them.

Chris Waddle
Ex-Newcastle and England winger on BBC Radio 5 Live

Liverpool have pushed Manchester United into so many errors. They just cannot get any rhythm going at all.

It should be 4-1 Liverpool!

Diogo Jota is played in by Roberto Firmino and he smacks it against the crossbar. He knows he should score too.

What a chance to finish the game off...

Marcus Rashford is caught late from Rhys Williams and wins a free-kick in the middle.

Bruno Fernandes wants a yellow card. He feels United were on the counter-attack.

Marcus Rashford makes that run in behind again but he's offside.

Alisson makes sure by coming to the edge of his area and heading it away.

Liverpool are pressing really high now. Luke Shaw gets away with it when he's closed down by Roberto Firmino.

What a night he's having so far!

Marcus Rashford tries to get on the end of a long ball from Victor Lindelof but Alisson is out quickly.

Andy Robertson hadn't dealt with it.

Roberto Firmino is the first Liverpool player to score a league brace at Old Trafford since Steven Gerrard in March 2014.

Big occasion.

Harry Maguire is shaking his head in frustration in the stands and Ole Gunnar Solksjaer doesn't look very happy.

Fabinho shows his composure as he moves through the middle, linking up with Thiago and Andy Robertson, before Diogo Jota's through ball rolls straight out for a goal kick.

A big 45 minutes coming up.

Can Liverpool hold on and keep top-four hopes alive?

This is only the third Premier League match where both teams had a Portuguese goalscorer, after Leicester 2-1 Man City on Boxing Day 2018 (Ricardo Pereira and Bernardo Silva) and Everton 1-3 Wolves on 2 February 2019 (André Gomes and Rúben Neves).

That was Roberto Firmino's first goal in the Premier League since 28 January against Tottenham.

Image source, Getty Images

Chris Waddle
Ex-Newcastle and England winger on BBC Radio 5 Live

Liverpool thoroughly deserve it in my eyes. Manchester United all over the shop at the moment. They need to look after the ball better and up the tempo.

Roberto Firmino has scored 17 headed goals in the Premier League for Liverpool; only Robbie Fowler (21) has netted more for the Reds in the competition.

23% of Man Utd's goals conceded have been from corners (9/39), the highest ratio in the Premier League this season.

Robin: Dean Henderson though good, is nowhere near the level of De Gea.

Ashwin R: Foul on Bruno not given at the other end, and it’s a goal at the other end.

Kaushik595: As a Liverpool fan, there is no better sight in this world than seeing Bobby smile so bright.

Chris Waddle
Ex-Newcastle and England winger on BBC Radio 5 Live

Great delivery. Put into the right area. Paul Pogba marking at the back post... He lets him go and give Roberto Firmino credit - he keeps his eye on it. But that is very poor from Manchester United. Pogba has to put his hand up there.

What a way to end the half!

It's been a pretty good game so far. Diogo Jota equalised after Bruno Fernandes' deflected opener had given Man Utd the lead.

Roberto Firmino with the goal for Liverpool on the stroke of half time.