According to Goal.com Di Matteo said:
"I think there is a lot of evidence that United get all the big decisions,"
"There are some feelings in general but I don't think [referees] do that with a purpose, it's just part of their decision-making and it seems to go in one direction."
"[Sir Alex Ferguson] likes to talk about other clubs, we tend not to. I'll leave it up to him. It doesn't really affect me too much, to be honest.
The Chelsea manager's comments come after Sir Alex Ferguson dismissed claims that referee Mark Clattenburg made comments of a racial nature to Chelsea holding midfielder John Obi Mikel. When questioned about the allegations Ferguson said:
"I don’t believe Mark Clattenburg would make any comments like that. I refuse to believe it. I think it’s unthinkable. In the modern climate I just refuse to believe it."
“It’s as simple as that."
"There’s no way a referee would stoop to that. I’m convinced of that.”
When questioned about Chelsea's position on the issue Di Matteo closed with:
"We believe we did what was right. I cannot say more than that because of the investigation,"
Both clubs will look to put the controversy of this week behind them as they look to upcoming fixtures. United face Arsenal at Old Trafford whilst Chelsea are away to Premier League newcomers Swansea.