Liverpool could win the Premier League title as soon as tomorrow night.
Jurgen Klopp's side hammered Crystal Palace 4-0 at Anfield to re-establish a 23-point lead over Manchester City at the top of the table.
Alexander-Arnold gave Jurgen Klopp's side the lead midway through the first half with a beautifully curled free-kick.
Mo Salah then doubled their lead on the stroke of half-time.
A long range howitzer from Fabinho made it 3-0 ten minutes after the break.
And Sadio Mane got in on the act on 69 minutes when he fired past Wayne Hennessy.
It means that anything other than a win for Manchester City against Chelsea will see the Premier League trophy heading for Anfield.
Earlier in the evening, Manchester United moved to within two points of the Premier League's top four.
Anthony Martial became the first United player to score a Premier League hat-trick Ole Gunnar Solskjaer's side beat Sheffield United 3-0 at Old Trafford.
It means United have now gone 13 games without defeat.
Wolves remain hot on the heels with United, and level on points with Solskjaer's side.
Raul Jiminez scored his fifteenth of the season as they beat Bournemouth 1-0 at Molineux.
The goal came about after more fine work from Armand Traore.
At the other end of the table, Aston Villa have climbed out of the Premier League's dropzone.
Ahmed Elmohamady scored late-on for Dean Smith's side to salvage a 1-1 draw away to Newcastle.
Steve Bruce's side had looked set to secure back-to-back wins after Dwight Gayle gave them a 68th minute lead.
Norwich City look more and more doomed with each passing game.
A rare Michael Keane goal gave Everton a 1-0 victory at Carrow Road.
The defeat leaves Norwich six points from safety with seven games to play.
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