Sanchez will definitely have a clause in his contract that enables to him to leave if Arsenal finish outside the top 4, subject to conditions. One of those will be the paying of a contractually agreed fee by the buying club - say £50m - but of course the single year left on his deal will impact commercially on that and the sum a willing purchaser will offer. The usual Arsenal way with these things is to leak strong 'no sale' to the press, then triumphantly announce to the media that he's going nowhere. The silence on this occasion is deafening....