Sir Alex Ferguson's team extended their lead at the top of the Premier League table to 10 points after completing a home-and-away league double over their historic rivals
Manchester United completed a Premier League double over Liverpool this season with a 2-1 victory at Old Trafford on Sunday afternoon.
Robin van Persie’s first-time 19th minute goal helped Sir Alex Ferguson’s team take a stranglehold that they never looked like relinquishing as they cantered to a home-and-away season double over their historic rivals.
