The 23-year-old registered a WhoScored player rating of 7.36 against the Hornets.
During the aforementioned Premier League fixture, Alexander-Arnold produced some world-class passes.
As you can see in the footage below, the defender and the forwards were on the same wavelength against the Hornets.
Alexander-Arnold is a very creative full-back. The Scouser has registered 47 assists in 186 appearances for Liverpool's senior team.
On another note, Liverpool defeated Watford 5-0 last weekend. The footage below was provided by Premier League TV.