Tottenham also have a 1-0 Champions League semi-final deficit to overturn against Ajax on Wednesday, but still have work to do to qualify for the competition next season after a sixth straight away league defeat.
"Mo got the hip of the goalie in his head and then was on the ground.
"We'll have to do a further assessment of course". He got a proper knock on the head.
"It is great that they do it, I love it".
The Magpies came within four minutes of handing Manchester City the chance to effectively retain their crown with victory over Leicester on Monday evening when they twice fought back to make it 2-2 against the Reds on Saturday.
However, the scrap for Champions League places behind them is effectively settled after the chasing pack dropped more points.
The hard-fought win means that Liverpool will hold on to their hopes of winning the Premier League, as they now top the table with 94 points and will await Manchester City's Monday clash against Leicester City. "They have showed it the whole season", Alexander-Arnold said.
Trent Alexander-Arnold was one of those recalled and the England right-back was to have an eventful evening at both ends.
Mohamed Salah restored the advantage soon after with his 22nd league goal of the season.
Newcastle are safe in the Premier League for another season, and manager Rafa Benitez believes this has been a "special" campaign.
"We will have conversations in the next couple of weeks". The boys did that and I couldn't be more proud.
The game was deadlocked at 2-2 when Salah was replaced by Divock Origi, who scored Liverpool's victor four minutes from time to the delight of his manager.