Juventus will most likely end this season without a title, but even so I don't see motta position as coach will be threatened in his first season coaching, there are indeed several names of coaches speculated as motta successor at this time including xavi but I think it's just an unreasonable rumour, after all changing the coach after the coach transition occurs previously is not a good thing for the development of the club because that it could have an impact on the decline of the team, Indeed xavi has brought barcelona to rise althogh their  under financial pressure previously, but we also should not forget that xavi experience as a coach is not too much, although he managed to bring barcelona to develop but it also inseparable from his familiarity with barcelona and la liga so far, so if he coaches juventus later, it is not certain that he will be better than motta because after all he needs to adapt to serie A and also juventus playing style which is much different from barcelona and la liga so far.