2. Composed defending
It is not often you see a 2-0 win being built on the back of great defensive unit instead of a moment of individual brilliance, but in this case, Liverpool's win was for the most part due to their composed defending. To further prove this point, this was the Reds' first clean sheet of the season at home. They shipped 19 goals at Anfield in all competitions this term before today.
Watford were the lowest scorers in the league, but there were moments in the match when the Reds appeared to play with their supporters' nerves. Ismaila Sarr wasted a glorious opportunity to draw level for the Hornets after Alisson had parried Deulofeu's cut-back into his path, then there was a near-calamitous backpass by Van Dijk in the second half which eventually rolled out of play and Liverpool were off the hook.
Despite those two give-away opportunities that Watford unsurprisingly failed to convert due to their appalling record in front of goal, Liverpool's back-line did fantastically well to keep Watford's attack quiet.