The Birmingham-born marksman netted the first treble of his professional career at Vicarage Road and, in turn, became the first Hornets player to do so since Michael Chopra back in April 2003.
And Deeney's efforts received a seal of approval from former Chelsea and Italy frontman Zola, who carved out a career as one of the top forwards in the game during his playing days.
"The boss (Zola) gave me loads of stick when he first came here, saying only real strikers score hat-tricks, so now I'm a fully-fledged real striker and I'm happy now. There's a big smile on my face," Deeney told Watford's official website.
"I didn't think I was going to get three chances, it was quite a tight, cagey affair after the first half. I think I had four or five shots in the game and scored three goals, so I'm very happy with that."