The Merseyside giants have won their last four fixtures in the Premier League and Mane has predicted that they will make it five victories in succession on Monday evening, a result which would take them level on points with leaders Manchester City.
The 24-year-old told The Telegraph: "We are going to beat Manchester United. Of course [I think that]. We all believe it. We are going to make it."
Mane has scored three goals in seven appearances in all competitions since making the switch from Southampton in the summer.