When Real Madrid sold Mesut Ozil to Arsenal last summer, not only did it shock a hell of a lot of people, but it was considered to be a rather daft decision indeed.
Since then Carlo Ancelotti has admitted that it was a mistake to allow the German playmaker to leave, even for the £42million they received. Our old friend hindsight really is a wonderful thing.
It’s an all too common occurrence that clubs release or sell a player, only to end up ultimately rueing it in the long run. As is to be expected, this summer looks set to be no different in terms of moves that generally defy basic logic. For one reason or another there’s a host of stars being linked with exits from their respective clubs, and we feel there’s no better time like the present to discern the ones who shouldn’t be in such a position.
Obviously there's certain individuals who spring to mind - the Cristiano Ronaldo's and Lionel Messi's of the footballing world - so we've steered clear of them.
Click on to see out Top 10: Stars who must not be sold this summer...