Nathaniel Clyne is a notable absentee from Liverpool’s Champions League squad.
The England international has yet to feature for Jurgen Klopp’s side this season owning to a back injury sustained during pre-season preparations.
But fears over the severity of Clyne’s problem have emerged following his omission from the Reds’ squad for their forthcoming Group E campaign.
Concerns about the 26-year-old have been heightened by Adam Lallana’s inclusion despite currently being sidelined until November with a thigh injury.
Liverpool are expected to call on Trent Alexander-Arnold, who scored in last month’s play-off win over Hoffenheim, and Joe Gomez during Clyne’s absence.
Also failing to make the 32-man squad list was Danny Ings and Lazar Markovic amid ongoing uncertainty over their futures at Anfield.
Young defender Conor Masterson is a surprise inclusion in Klopp’s team that will take on Sevilla, Spartak Moscow and Maribor between now and early December.