The Ireland ‘keeper replaces Alisson Becker between the sticks at Vicarage Road as the Reds make four changes from the draw with Manchester City last time out.
Trent Alexander-Arnold returns in defence while there are also starts for Naby Keita and Roberto Firmino.
Liverpool: Kelleher, Alexander-Arnold, Matip, Van Dijk, Robertson, Henderson, Milner, Keita, Mane, Salah, Firmino.
Subs: Adrian, Konate, Gomez, Oxlade-Chamberlain, Minamino, Jota, Tsimikas, Origi, Williams.