Ferguson: I can't believe the judge said something racist © EuroFootball.com

Sir Alex Ferguson doubts the accusations of racism thrown at referee Mark Clattenburg.

The experienced referee is accused of calling Chelsea's black defender Jon Obi Mikel "shut up, you monkey" during the match between "Man Utd" and London's "Chelsea".

"I don't believe he could have said that. I just can't believe it - it would be too unbelievable," said the Manchester team's manager.

Due to the possible racism by Clattenburg, "Chelsea" has already turned to the Football Association of England. However, both the referee himself and his assistants, who maintained radio contact throughout the entire match via microphones, strongly deny the accusations.