If Liverpool should draw with Manchester United, they know what's at stake for them in the Premier League table. A draw with Manchester United indicates that they wish to give up ground to Arsenal to stay above them, as Arsenal will undoubtedly win at home against Brighton. Therefore, regardless of how defensively Manchester United plays, Liverpool will make every effort to defeat Manchester United to maintain their recent top position in the Premier League standings.
I think Liverpool has everything to beat Man United. They performed well in EPL matches lately, they also will play at home in the upcoming match. They are unbeatable in the last 5 matches, meanwhile Man United always performed very unstable. Moreover, there are too many problem with Man United lately, it may bother their focus in playing. So, there is no reason that the match against Man United will end with a draw. I'm very sure that Liverpool will get full points in the upcoming match. I even doubt that Arsenal can easily win against Brighton. This team sometimes becomes the obstacle of the top teams in EPL. So, Arsenal can't underestimate Brighton although Arsenal is superior against them.