Cutting in off the left-hand side of Liverpool's attack, Luis Diaz's savvy drop of the shoulder earned him half a yard of space to pull the trigger.
And pull the trigger he did, leaving Alex Meret with no chance between the Napoli sticks as he scrambled across the width of his goal to try, but ultimately fail, to keep the Italian's four-goal advantage intact.
As Harvey Elliott raced to retrieve the ball from the back of Meret's goal, in the hope of Diaz's curling strike providing the Reds with the foundations to stage a remarkable comeback in south-west Italy, the 25-year-old's efforts subsequently were in vain as Liverpool sank to an embarrassing 4-1 thrashing in Naples. It was their third defeat in four visits to the region of Campania.