Rio Ferdinand of Manchester United reacts after being hit by a coin thrown from the crowd during the Barclays Premier League match between Manchester City and Manchester United at Etihad Stadium in Manchester, Britain on Dec. 9, 2012. Manchester United won 3-2. (Xinhua/Wang Lili)

Rio Ferdinand of Manchester United reacts after being hit by a coin thrown from the crowd during the Barclays Premier League match between Manchester City and Manchester United at Etihad Stadium in Manchester, Britain on Dec. 9, 2012. Manchester United won 3-2. (Xinhua/Wang Lili)

Rio Ferdinand (L) of Manchester United reacts after being hit by a coin thrown from the crowd during the Barclays Premier League match between Manchester City and Manchester United at Etihad Stadium in Manchester, Britain on Dec. 9, 2012. Manchester United won 3-2. (Xinhua/Wang Lili)

Samir Nasri (C) of Manchester City breaks through defense from Patrice Evra (L) and Tom Cleverley of Manchester United during the Barclays Premier League match between Manchester City and Manchester United at Etihad Stadium in Manchester, Britain on Dec. 9, 2012. Manchester United won 3-2. (Xinhua/Wang Lili)

Carlos Tevez (Front) of Manchester City vies with Rio Ferdinand of Manchester United during the Barclays Premier League match between Manchester City and Manchester United at Etihad Stadium in Manchester, Britain on Dec. 9, 2012. Manchester United won 3-2. (Xinhua/Wang Lili)

Mario Balotelli (2nd R) of Manchester City vies with Patrice Evra (2nd L) of Manchester United during the Barclays Premier League match between Manchester City and Manchester United at Etihad Stadium in Manchester, Britain on Dec. 9, 2012. Manchester United won 3-2. (Xinhua/Wang Lili)

Sergio Aguero (R) of Manchester City reacts after Wayne Rooney of Manchester United scores during the Barclays Premier League match between Manchester City and Manchester United at Etihad Stadium in Manchester, Britain on Dec. 9, 2012. Manchester United won 3-2. (Xinhua/Wang Lili)

Yaya Toure (2nd L) of Manchester City celebrates after scoring with his teammate Samir Nasri (2nd R) during the Barclays Premier League match between Manchester City and Manchester United at Etihad Stadium in Manchester, Britain on Dec. 9, 2012. Manchester United won 3-2. (Xinhua/Wang Lili)

Samir Nasri (Back) of Manchester City vies with Jonny Evans of Manchester United during the Barclays Premier League match between Manchester City and Manchester United at Etihad Stadium in Manchester, Britain on Dec. 9, 2012. Manchester United won 3-2. (Xinhua/Wang Lili)

Mario Balotelli of Manchester City reacts during the Barclays Premier League match between Manchester City and Manchester United at Etihad Stadium in Manchester, Britain on Dec. 9, 2012. Manchester United won 3-2. (Xinhua/Wang Lili)

Roberto Mancini, manager of Manchester City reacts before the Barclays Premier League match between Manchester City and Manchester United at Etihad Stadium in Manchester, Britain on Dec. 9, 2012. Manchester United won 3-2. (Xinhua/Wang Lili)

Pablo Zabaleta of Manchester City celebrates after scoring during the Barclays Premier League match between Manchester City and Manchester United at Etihad Stadium in Manchester, Britain on Dec. 9, 2012. Manchester United won 3-2. (Xinhua/Wang Lili)

Carlos Tevez (L) of Manchester City vies with Chris Smalling of Manchester United during the Barclays Premier League match between Manchester City and Manchester United at Etihad Stadium in Manchester, Britain on Dec. 9, 2012. Manchester United won 3-2. (Xinhua/Wang Lili)

Roberto Mancini (R), manager of Manchester City shakes hands with Sir Alex Ferguson, manager of Manchester United before the Barclays Premier League match between Manchester City and Manchester United at Etihad Stadium in Manchester, Britain on Dec. 9, 2012. Manchester United won 3-2. (Xinhua/Wang Lili)

Carlos Tevez (L) of Manchester City vies with Chris Smalling of Manchester United during the Barclays Premier League match between Manchester City and Manchester United at Etihad Stadium in Manchester, Britain on Dec. 9, 2012. Manchester United won 3-2. (Xinhua/Wang Lili)