Man City best team in world says Klopp ahead of Napoli in UCL opener
Liverpool know from experience that they can't take anything for granted at Napoli, where they lost 1-0 last season before beating the Italian side by the same score at Anfield to advance to the knockout stages.
Forward Divock Origi is out after twisting his ankle in Liverpool's 3-1 win over Newcastle at the weekend, and teenager Rhian Brewster has taken the Belgian striker's place in the squad.
Midfielder Naby Keita and goalkeeper Alisson Becker remain sidelined.
Austrian champion Salzburg host Belgian counterpart Genk in the other Group E game.