Belgian stopper Simon Mignolet starts ahead of Loris Karius between the sticks at Vicarage Road.

Liverpool academy product Trent Alexander-Arnold is in at right-back, with Alberto Moreno on the left following an impressive pre-season.

Dejan Lovren slots in alongside Joel Matip in the heart of defence, where the Merseysiders have tried hard to strengthen this summer.

Klopp has gone for a midfield trio of Jordan Henderson, Emre Can and Georginio Wijnaldum in his 100th game in charge of the Reds.

Liverpool new boy Salah lines up with Roberto Firmino and Sadio Mane in a threatening front-three.

Wantaway Barcelona transfer target Philippe Coutinho sits out of the clash against Marco Silva's men through injury.

Nathaniel Chalobah, meanwhile, makes his first Premier League appearance for Watford since returning there from Chelsea on a permanent deal.

Liverpool Starting XI: Mignolet, Alexander-Arnold, Lovren, Matip, Moreno, Henderson, Can, Wijnaldum, Salah, Mane, Firmino

Liverpool Subs: Karius, Klavan, Gomez, Milner, Grujic, Solanke, Origi

Watford Starting XI: Gomes, Janmaat, Kabul, Britos, Holebas, Doucoure, Chalobah, Amrabat, Cleverley, Pereyra, Okaka

Watford Subs: Pantilimon, Prodl, Richarlison, Gray, Femenia, Watson, Capoue