Trent Alexander-Arnold, who was rested in the game against Manchester United, became the youngest player in Premier League history to create three goals in top-flight.
Jurgen Klopp has revealed that the youngster has kept the match ball for three assists after Watford win. Traditionally, players keep the ball when they have scored a hat-trick, but Trent thought he might as well do the same for his kind of "hat-trick".
After this, Manchester United fans couldn't resist and started trolling Liverpool on Twitter.
One said:
The other one commented: "That's not a thing."
As the third one said: "They'll be keeping the flags when they take 3 corners next."