Manchester United manager Sir Alex Ferguson insists lucky breaks even themselves out over the course of a season.
On Wednesday Patrick Vieira suggested that United, along with most major clubs in Spain and Italy, benefited from favourable decisions on home soil - although the Frenchman later claimed his comments were taken out of context.
The argument has been reignited following Michael Oliver's failure to award Fulham a last-minute penalty at Old Trafford on Monday for Michael Carrick's clumsy challenge on Danny Murphy.
Ferguson accepts United - who won the game 1-0 - were lucky with that one.
However, he can cite plenty of other instances where his team were wronged.
"From the referee's position, I can see why he didn't give a penalty when Danny Murphy was brought down," he said.
"The ball moved to the angle as Michael Carrick challenged him. From that position, it wasn't clear.
"It was a good claim but City could have had a penalty against them at Stoke for a foul by Gare...