Sunk-cost fallacy - the phenomenon whereby a person is reluctant to abandon a strategy or course of action because they have invested heavily in it, even when it is clear that abandonment would be more beneficial. This describes the present situation that Juventus is in with Allegri. Furthermore, I think that Vlahovic may be having some regrets about not moving to Arsenal earlier. I ask myself what is going to be the last straw that will break the camel's back for the management of Juventus to sack Allegri.