Manchester United manager Sir Alex Ferguson (L) communicates with his assistant Rene Meulensteen during the Barclays Premier League match between West Ham United and Manchester United at Upton Park in London, Britain, on April 17, 2013. The match ended with a 2-2 draw. (Xinhua/Wang Lili)

West Ham United manager Sam Allardyce (L) hugs Manchester United manager Sir Alex Ferguson after the Barclays Premier League match between West Ham United and Manchester United at Upton Park in London, Britain, on April 17, 2013. The match ended with a 2-2 draw. (Xinhua/Wang Lili)

Robin van Persie of Manchester United leaves the pitch after the Barclays Premier League match between West Ham United and Manchester United at Upton Park in London, Britain, on April 17, 2013. The match ended with a 2-2 draw. (Xinhua/Wang Lili)

Rafael Da Silva of Manchester United leaves the pitch after the Barclays Premier League match between West Ham United and Manchester United at Upton Park in London, Britain, on April 17, 2013. The match ended with a 2-2 draw. (Xinhua/Wang Lili)

Andy Carroll of West Ham United looks on during the Barclays Premier League match between West Ham United and Manchester United at Upton Park in London, Britain, on April 17, 2013. The match ended with a 2-2 draw. (Xinhua/Wang Lili)

Manchester United manager Sir Alex Ferguson looks on before the Barclays Premier League match between West Ham United and Manchester United at Upton Park in London, Britain, on April 17, 2013. The match ended with a 2-2 draw. (Xinhua/Wang Lili)

Robin van Persie (R) of Manchester United celebrates scoring an equal goal in the second half during the Barclays Premier League match between West Ham United and Manchester United at Upton Park in London, Britain, on April 17, 2013. The match ended with a 2-2 draw. (Xinhua/Wang Lili)

Antonio Valencia (R) of Manchester United celebrates scoring during the Barclays Premier League match between West Ham United and Manchester United at Upton Park in London, Britain, on April 17, 2013. The match ended with a 2-2 draw. (Xinhua/Wang Lili) 

Mohamed Diame (R) of West Ham United celebrates scoring with his teammate Gary O'Neil during the Barclays Premier League match between West Ham United and Manchester United at Upton Park in London, Britain, on April 17, 2013. The match ended with a 2-2 draw. (Xinhua/Wang Lili)

Mohamed Diame (2nd L) of West Ham United celebrates scoring with his teammates Gary O'Neil (2nd R) and James Collins (1st R) during the Barclays Premier League match between West Ham United and Manchester United at Upton Park in London, Britain, on April 17, 2013. The match ended with a 2-2 draw. (Xinhua/Wang Lili)

Robin van Persie (L) of Manchester United celebrates scoring an equal goal in the second half during the Barclays Premier League match between West Ham United and Manchester United at Upton Park in London, Britain, on April 17, 2013. The match ended with a 2-2 draw. (Xinhua/Wang Lili)

Mohamed Diame (L) of West Ham United celebrates scoring with his teammates Gary O'Neil (C) and James Collins during the Barclays Premier League match between West Ham United and Manchester United at Upton Park in London, Britain, on April 17, 2013. The match ended with a 2-2 draw. (Xinhua/Wang Lili)