Liverpool left-back Andy Robertson serves a one-match suspension for the Champions League quarter-final, first-leg visit of Porto.
Midfielder James Milner is expected to deputise as although Alberto Moreno is manager Jurgen Klopp's other option the Spaniard has not featured since early January.
Adam Lallana is a doubt with a minor muscle injury which forced him to miss Friday's win at Southampton .
Klopp is wary of the threat of Porto, who Liverpool beat in the last 16 last season thanks to a 5-0 away win.
"They are a very experienced team, they are together with Benfica first in the table in Portugal," Klopp added.
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"Really strong side, more experienced than last season, so it's a different game to last year. We have to play it again and we want to play it again.
"We were very clinical that night (the 5-0 win). But they can use the game last year as a motivational thing, we cannot do that.
"When we analysed them (Porto) last season no-one thought it would be 5-0 but in that situation we were difficult to deal with. It can be a bit of a wild game as they are good at counter-pressing, creative in midfield and full-backs are good crossers."
Provisional squad: Alisson, Alexander-Arnold, Matip, Van Dijk, Milner, Fabinho, Henderson, Wijnaldum, Salah, Firmino, Mane, Mignolet, Lovren, Moreno, Keita, Shaqiri, Origi, Sturridge
