Chelsea boss Andre Villas-Boas has expressed his fury at the "poor performance" of officials during his team’s 3-1 loss to Manchester United on Sunday.
The Portuguese manager believes that two of Manchester United’s goals were offside and that they should have been spotted by the linesmen.
"I am very, very unhappy with the poor performance from the officials which had a decisive role in Sunday's result," he said.
"I cannot waste my time organising defensive set-plays only for the linesman to make a mistake like that. I don't take that lightly and I have already taken the matter further.
"I have been through the official channels and made my unhappiness clear to [Professional Match Officials Board manager] Mike Riley."
The Blues go on to face local rivals Fulham tonight (Wednesday) in a third-round Carling Cup clash.