Manchester United boss Sir Alex Ferguson fears the worst when a minute's silence is held to commemorate the 50th anniversary of the Munich air disaster before England's international against Switzerland tomorrow.

A similar tribute will be held before Manchester United take on Manchester City at Old Trafford on Sunday and Ferguson is acutely aware that "one or two idiots" could make sure it is remembered for the wrong reasons.

His primary concern is the game at Wembley.

"There could be a mixed reaction," the United manager acknowledged. "You never know because England fans are a mixture of supporters from all different clubs. I just hope that it goes well because, if it weren't to, it could give encouragement to City fans to misbehave themselves at the derby."