Sir Alex Ferguson doubts Chelsea's Mark Clattenburg claims

Manchester United boss Sir Alex Ferguson does not believe referee Mark Clattenburg used "inappropriate language" towards Chelsea player John Mikel Obi.

The Blues accused Clattenburg of making a racist remark during their 3-2 defeat by United at Stamford Bridge on Sunday.

Ferguson added he expects no problems from Arsenal fans on Saturday at Old Trafford, despite their former forward Robin van Persie expected to start for United.