The Egyptian has already scored 12 goals in 11 appearances so far this season and is regarded by many as the best in the world right now.
Souness agrees with that view, but highlighted a part of his game that will 'frustrate' teammates.
"He is perhaps as greedy a player as I have seen. All the top names have an element of that but he is extremely selfish.
"Personal targets are important to him and he shoots from every possible angle, which frustrates his team-mates at times — especially Mane.
"The other players accept it because he is so good. When he doesn't square it, he is either scoring or making goalkeepers work so that the follow-up is a tap-in for someone anyway, which makes it hard for anyone to criticise him.
"He may even take it as a compliment that I think he is the most selfish player I have seen because he is a goal machine."
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