So, today's Vidal stuff all seems to be coming from an article in the Daily Express:
http://www.express.co.uk/sport/football/493991/Arturo-Vidal-set-to-tell-Juve-he-DOES-want-Man-Utd-move-in-dramatic-U-turn
You then have GdS and other Italian sources citing it and then the BBC citing GdS.