The basic thought of renewing a player who´s regressed badly since his last contract is baffling to me. Dude is 27, injury-prone, mentally weak and off form the majority of each season. This club is yearning for CL and really wants to reward a guy who hasn´t performed there for years.
Sell him this summer. He hasn´t earned an improved contract, every argument is just wishful thinking hoping for a renaissance. If he gets renewed and doesn´t perform next year as well the scrutiny will intensify by 100x. Clearly he doesn´t thrive under pressure either which should´ve been the first criteria before handing him the nr 10 at Juventus.
Stop treating him like a young talent with some crazy unfulfilled potential who might explode in the near future. The guy turns 28 this year, what you saw these last years is what you´ll get.