Alan Pardew has revealed Mike Ashley has issued his players with formal legal warnings about Twitter. Alan Pardew: "I spoke to Sir Alex Ferguson, and United's policy is that nobody at their club can comment about the football club [on Twitter]. "It's in breach of contract if you are criticising the owner, the masseur, a player, anyone at the football club. Giving out injury news causes problems too. "We've notified the players this morning. They've probably seen it as another sort of dictatorial moment from us but we've had to issue them legally with a letter to say this is not right, it's a breach of contract and you have to understand you're going to be fined and disciplined for that. It can't happen. "Sir Alex shared with me quite ferociously how difficult this Twitter issue is for clubs, particularly managers. "The problem I have with this new medium of Twitter is that people are twittering in an emotional state. "Putting something out instantly can be very, very, damaging - not only to a football club but to any organisation."