Liverpool have made three changes from the side that beat RB Salzburg on Tuesday.
Robertson and Keita drop to the bench while Lovren is out with an injury, meaning Gomez, Shaqiri, and Milner, who has a new contract, come in. Neco Williams, the 18-year-old right-back, is on the bench for the first time in the Premier League this season. He did, however, start in the Carabao Cup at Arsenal.
Livescore: Liverpool vs Watford
Liverpool XI: Alisson, Alexander-Arnold, Gomez, Van Dijk, Milner, Wijnaldum, Henderson, Shaqiri, Mane, Firmino, Salah
Subs: Adrian, Keita, Oxlade-Chamberlain, Lallana, Origi, Williams
Watford XI: Foster, Femenia, Kabasele, Cathcart, Mariappa, Doucoure, Capoue, Hughes, Sarr, Deulofeu, Deeney
Subs: Gomes, Dawson, Chalobah, Gray, Quina, Success, Foulquier