Meanwhile, it is also understood that the club have launched a complaint about words spoken to Juan Mata during the clash.
Oct 28, 2012 at 4pm UK at Stamford Bridge
Man UtdManchester United
Football Association begin investigation into Mark Clattenburg allegations
© PA Photos
The Football Association begin an investigation into allegations that referee Mark Clattenburg used "inappropriate language" during Chelsea's defeat to Manchester United on Sunday.
Ex-referee Winter defends Clattenburg>
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