Visiting managers used to joke that they would be happy to win even a corner kick at Old Trafford, such was Manchester United's aura of invincibility in their famous stadium. The atmosphere was both pulsating and hostile; it helped that over the years, United had the likes of George Best, Bobby Charlton, Denis Law, Mark Hughes, Ruud van Nistelrooy, Eric Cantona, Wayne Rooney, Andy Cole and Ryan Giggs (plus many more) to call upon to torment opposing defences.
It was generally accepted that most players would walk to the ground on broken glass if they were offered the chance to sign for one of the most famous clubs on the planet.