It's going to be difficult to choose between Mane and Virgil who's the better player for Liverpool, I'll choose mane because of the number of goals he scores. If Liverpool are to beat Athletico Madrid, then Mane would have a pivotal role to play.
Both of them are very much needed in Liverpool, especially when dealing with Atletico Madrid this month, Mane is an outstanding striker and Mohamed Salah has an important role in the match.
I think that if these two attackers will play and play against Atletico Madrid it will be easier.