Martin O'Neill believes Robin van Persie could make the difference for Manchester United this season.
Van Persie scored his 15th goal of the campaign as United recorded a 3-1 win over Sunderland at Old Trafford to remain six points clear of Manchester City at the top of the Barclays Premier League.
"Robin van Persie was a great purchase," said O'Neill. "It means Manchester United are capable of scoring goals because Wayne Rooney is a top quality player as well.
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