Manchester United defender Rio Ferdinand claims Manchester City boss Roberto Mancini is wrong to think Red Devils' good form is just down to Robin van Perise's goals.

The Dutchman scored 27 Premier League goals in 2012, more than any other player, and he started 2013 in the same style as the north west side maintained their seven point lead at the top of the table.

Van Persie scored twice, as did Javier Hernandez, as United enjoyed a comprehensive 4-0 win over Wigan at the DW Stadium.