Sir Alex Ferguson has called on Manchester United's supporters not to launch into their now traditional tasteless abuse of Arsene Wenger on Sunday.
It has been a feature of recent clashes between United and the Gunners that Wenger has come under sustained attack from the Red Devils supporters, with one particularly vile song being repeatedly directed at the Frenchman.
As Ferguson himself has had cause to complain about the treatment he has received at the Emirates Stadium in recent years, both clubs understand there is a need for caution and cool heads.
And the United boss feels it is time for the abuse towards Wenger in particular to stop.
"I know there has been some terrible abuse from our fans towards Arsene Wenger," said Ferguson.
"But a line has to be drawn. They must know that themselves."
It is only a couple of years ago that Harry Redknapp was subjected to awful taunting at Villa Park, while Ferguson's profile ensures he bears the brunt of plenty of fan ire at visiting grounds.
"It is unavoidable that managers do get abused," he said.
"I get it myself. Most managers do.
"Sometimes I can't hear these chants, or make them out but it has to be controlled."
Ferguson delivered his sermon less than 48 hours after praising United's supporters to the hilt for the part they played in their team's Carling Cup victory over Manchester City at Old Trafford on Wednesday.
Then, the Scot said if the Red Devils received similar backing throughout the season, they would hardly lose a game.
But he feels it must be pointed out that positive support is far different to negative attacks on members of the opposition camp.
"There is none better than our support, as it showed on Wednesday," said Ferguson.
"I was really proud of them.
"But they have a team to support.
"They don't need to worry about anyone else. They should be proud of the players."Reuse content