Liverpool have never won at Old Trafford under Rafa Benitez.
Liverpool have taken 10 points from four games against 'big four' rivals this season.
United have won only one of their four games against 'big four' rivals this season.
There have been three red cards in the last four league meetings between Liverpool and United.
Rio Ferdinand has scored three Premier League goals against Liverpool, he has not scored more than one against any other top-flight side.