Genk boss Felice Mazzu says Liverpool aren't as strong when Mohamed Salah is missing.
The Reds are preparing to fly out to Belgium for Wednesday's game against Genk in the Champions League.
And Mazzu thinks Liverpool are a different animal without Salah in their side.
He said: "When Salah is missing. On the pitch the movements of the strikers are a little bit different. I don't know if Salah will be there tomorrow.
"The Manchester United system played with a five-man defence. It was a good thing for them. We have a lot of options so we will see tomorrow."
