The Egyptian winger had given Liverpool the lead in the first half when he curled home a beautiful strike at the end of a quick break.
Up until that point, Watford had frustrated the Anfield side with 11 men behind the ball more often than not.
And they continued to play like afterwards too, threatening on the break themselves with a number of chances.
Failing to add to their only goal, Anfield began to sound nervy – until Salah came up with another to seal the win and three points.
And it was a beauty:
How good is that?
Now Liverpool will focus on the Club World Cup in Qatar over the coming week, playing their first game on Wednesday.
First, it’ll be the Carabao Cup quarter-final against Aston Villa, where Liverpool are expected to play a host of young players while their main squad prepares for Wednesday’s match.