Sadio Mane has bigger importance for Liverpool than Mo. Salah because he contributed more for the whole tactic operations than Salah. Another plus point for Mane is he is not selfish like Salah. People talked too much about the conflict of interests between Mane and Salah, that I disagree because the main cause came from Salah's selfishness.
Turning back to the point, on-post context, the good news for Mane's fitness condition is very good for Liverpool and sure if he can play at his best, Liverpool has good odds to win that match.