I don't think Liverpool will easily beat Manchester United in the upcoming match even though Manchester United's status is in a slump in the last two games. Nunez got a red card in the previous game, he will automatically miss the match against Manchester United. Well without Nunez I think Liverpool will have a hard time scoring goals in the game later.
If only one player like Nunez gets a red card at Liverpool. So Liverpool will easily put other players in Nunez's position even though the player's potential is slightly different from Nunez. And I think Liverpool will not be so difficult to face the game that will take place at home to Manchester United. Liverpool also know that Manchester United will try to win the game at home to get points after failing to get points twice in the previous two matches.