One thought for you all to consider.
Arsenal has a long track record of failing to deliver on transfers. In fact the more of a media frenzy, often it's less likely anything will happen.
As an old, embittered, cynical, seen it all before, curmudgeonly old Gooner, it would not surprise me if Sanchez is still at Arsenal come 1st February. Unlikely I admit, but not impossible.
Its Wenger's wish no doubt and the board will support him on that.
Its only if he relents and it could be without Miki going the other way in the end that the deal will be done in January.