The 21-year-old was selected in Jurgen Klopp’s starting line-up in midfield alongside Lucas Leiva and club captain Jordan Henderson.
Liverpool remain in ninth position following todays defeat with 24 points in 17 games. Watford also remain in seventh place with 28 points in 17 matches.
The Hornets have now won four games in a row and are just a point off the top four.
Watford 3 – 0 Liverpool
Kick-Off: 13:30 (GMT)
Stadium: Vicarage Road
Watford confirmed starting line-up: Heurelho Gomes, Nathan Aké, Miguel Britos, Craig Cathcart, Nyom, Etienne Capoue, Almen Abdi, Jurado, Ben Watson, Troy Deeney, Odion Ighalo
Liverpool confirmed starting line-up: Bogdan, Clyne, Skrtel, Sakho, Moreno, Lucas, Henderson, Can, Lallana, Coutinho, Firmino.
Subs: Fulton, Toure, Randall, Allen, Ibe, Origi, Benteke.