Manchester United were humbled 1-0 by Norwich City and Chelsea upset at West Bromwich Albion on Saturday as champions Manchester City took advantage of their rivals' mistakes to go top with a 5-0 demolition of Aston Villa.
Edin Dzeko shone to give 10-man Manchester City a battling 4-3 victory at Norwich City but leaders Manchester United also won as own goals and more controversial refereeing marked the last Saturday of 2012.
A midweek slip-up has again left Manchester City needing seven points to draw level with title rivals Manchester United ahead of a weekend encounter with an unpredictable Liverpool side capable of inflicting further pain.