Sir Alex Ferguson has spoken of his concerns about the news that one of Fabio Capello's team-talks was bugged during England's preparations for their friendly against Egypt last week.

Ferguson was speaking from personal knowledge after a device was planted in the home dressing room at Old Trafford before a game against Chelsea in 2005 and the tape was offered to newspapers.

'It happened to us once before,' Ferguson said. 'I would be concerned about it. Preparation involves discretion and secrecy. I haven't revealed one bit of my tactics ahead of the match [against Milan] tomorrow. I haven't been asked [by reporters] and do you know why? Because I wouldn't tell anyone. Why should I tell anyone? Capello may have been discussing some important issues about his team and all of a sudden someone else has got it. So it is a concern.'