I don't understand. It's plainly obvious why someone would not want to go on record as saying "my client/I/my brother (etc) wants to leave" and if they did carry quotes from a 'source' then the criticism would be exactly the same.
I'm not saying the story is true but it is incredible when people, even in this day and age knowing media handling as we do, completely dismiss any story that doesn't have cited, direct quotes. It's odd how only football stories are subject to this. If we've heard that a leaked report has said that a MP has fiddled his expenses, who says or even thinks "No direct quote? Utter shite!!"?
The threshold at which we judge the veracity of football stories is silly. Yes it may not be true or it may be but no quotes or no direct citation of them doesn't mean a thing.