Liverpool
Alisson Becker - 7/10
The Brazillian conceded early in the game, but since then his distribution and handling were immaculate. Alisson was also instrumental in Liverpool's fourth goal where his quick pass to Salah allowed him to run ragged at the Arsenal defence which led to the Egyptian winning and converting a penalty.
Trent Alexander-Arnold - 6.5/10
Alexander-Arnold provided width in the right flank and supported Salah well in attack. Apart from Arsenal's only goal, he did his best to stand up to Iwobi to stop crosses from the left side.
Dejan Lovren - 7/10
Lovren partnered well with Van Dijk and always provided cover for the Dutchman. It was another solid performance from the Croatian.
Virgil van Dijk - 7.5/10
Liverpool's captain of the night, Virgil van Dijk was solid as usual. He had to deal with one of the best strikers in the Premier League this season which the Dutch International did brilliantly.
Andrew Robertson - 7/10
Robertson was up for it from the first whistle and ran continuously till he got substituted in the second half. He not only provided width in the flanks but helped out the defence as well. However, the Scottish International was guilty of not tracking the run of Maitland-Niles for Arsenal's goal.
Fabinho - 7/10
The former Monaco midfielder took some time to get into the game. He gave away a few easy passes in the early stages allowing the Gunners to put pressure on the home side. However as the game progressed, his interceptions and positioning improved as well.
Georginio Wijnaldum - 7/10
Wijnaldum continued giving it his all as he stopped Arsenal attacks tormented the likes of Xhaka and Torreira in midfield. Without Henderson and Milner, Klopp could always rely on the Dutchman to give his 100 percent, and he got the same today as well.
Xherdan Shaqiri - 7.5/10
Shaqiri started today alongside the deadly front three and supported them from the midfield. He played a couple of brilliant defence-splitting passes which is an example of the Swiss' class and vision. Shaqiri had a shot from outside the box in the second half, but it was straight at Leno on goal.
Sadio Mane - 7.5/10
Mane kept Lichsteiner on his toes since the first whistle. His pace and power were something the Arsenal man had trouble dealing it. The Senegalese scored Liverpool's third of the night and created a great chance for himself at the start of the second half.
Roberto Firmino - 9/10
Roberto Firmino became the all-time leading Brazilian scorer in the Premier League after his hat-trick against Arsenal. If the first one came under fortunate circumstances, the second was a sheer display of elegance, skill, and class. He rounded off a fantastic night with a brilliant penalty in the second half.
Mohamed Salah - 8/10
It was a battle between league top two scorers - Mo Salah and Aubameyang, and the Egyptian deservedly came out on top. First, he set up Mane beautifully for Liverpool's third and then converted a penalty which he earned himself to score the Reds' fourth goal of the day.
Substitutes
Jordan Henderson - 7/10
The England International came in the second half to give some stability in the midfield. He looked solid and even tried few shots from outside the box to increase Liverpool's lead.
Adam Lallana - 5/10
Klopp introduced Lallana when the game was already done and dusted. He got some game time which would be good for the side and himself moving forward.
Nathaniel Clyne - NA
Clyne came on very late in the game to make an impact.