Manchester United host Manchester City on Sunday in the fourth meeting between the bitter rivals so far this season.
A victory for United would continue their good form and provide a major boost to their hopes of finishing in the Champions League places.
But victory for City will delay Liverpool's procession to the Premier League title by at least another week.
United have had the beating of City so far this season, winning both of their games at the Etihad in the Premier League and League Cup semi-finals with devastating counter-attacking performances.