Salah brought Jurgen Klopp’s men level but Fernandes’ 78th-minute free-kick sealed victory for United, 12 minutes after he came on.

It gave Ole Gunnar Solskjaer a first win over Liverpool as United manager and the Norwegian said afterwards: “He’s got that quality in and around the box. He’s proven to give players assists or score goals.

“Today was a very good free-kick. He managed to practise a lot yesterday because wherever he starts, I tell him to go straight in. He can’t do extra free-kicks.

“Yesterday he was told that he wasn’t playing so he stayed out practising for half an hour, 45 minutes. I don’t know how long but it worked and it paid off.”

Solskjaer’s men impressed for large periods of a gripping encounter and he continued: “It’s fantastic to win games against last year’s champions. They’re a fantastic team.

“We’ve had good results over the last couple of years. Played different systems but this time we play on our terms as well.

“We’ve found a way we believe in, the players believe in and we’re getting stronger and stronger.

“(The) mentality to come back (from)  1-0 down, we’ve shown that so many times this season, and I feel physically as well we’re stronger and stronger and last the games much more.

“We look at the difference from a year or ago, or six months back, so you can’t take too many big strides at one point. But we’re gradually, layer by layer, getting better, winning tight games, so the morale and confidence is very good.”

A fifth-round home clash against West Ham is the reward for United, who made sure Liverpool’s difficult start to 2021 continued.

A victory against Aston Villa’s youngsters is the only win Klopp’s men have managed in their last seven matches in all competitions, but the Reds boss is taking positives ahead of Thursday’s trip to Tottenham.

“It’s not what we wanted, it’s always frustrating but it’s how it is,” Klopp said.

“If you want to win tonight you have to play at your absolute top and we weren’t at our absolute top. We made a lot of steps in the right direction.

“(The) start of the game was good and then we made decisive mistakes. Around the first goal United scored, we obviously had too many options offensively and no protection and lost the ball.

“It wasn’t the first counter-attack in the game so we have to improve that but you can see the boys really wanted to change the fortune.

“We want to score goals. That’s good. We scored twice, which is good as well, and so that’s all OK.

“But in the end they scored three, we scored two. They are through and we are not, so that’s a fact as well.

“We can take positives out of this game, of course. I saw a lot of steps in the right direction.

“It was good preparation for the Tottenham game with their counter-attacking threat, so we know exactly what we have to work on.

“But it’s how it is. If you’re in a situation you don’t like, you want to get out of it – and we want to get out of it.

“For that we have to make steps. Tonight we made big steps, not the final ones but we made steps and that’s for the moment OK.”