But the outgoing Premier League champions are back in great heart as their attention turns to their contest with Albion.
The Reds turned in what many observers are describing as their best performance of the season in beating Galatasaray 4-0 on Wednesday.
Salah capped the performance with a classic goal, his 50th in the competition, having earlier seen a tame penalty saved.
Mohamed Salah (centre) celebrates with Virgil van Dijk (Image: Martin Rickett/PA Wire)
But he left the field in the closing stages amid some concern.
Liverpool boss Arne Slot said: “Mo and the team came out in the second half the way they did.
“He assisted Hugo (Ekitike), a great assist, and then scored a trademark goal that he has scored so many times in this stadium and for this club, cutting inside, finding the corner.
“So that tells you a lot about his mental strength but definitely also of the team, because adversity is something we can definitely talk about in this season.
“Injury-wise he came off not because he had scored enough but because he felt something so let’s see where he is for the weekend and afterwards.”
Salah has 11 goals and ten assists in 20 games against Albion across all competitions.
Twelve of those matches have been won, including two meetings at Anfield this season.