I hope Dybala keeps number 21. If he accepts the 10, it just shows his lack of belief and blindly following the big money marketing chunk of the number 10. Let the number 10 be reserved for a leader of this squad, not just give to a random rising star just to leave us for cash after we are serious contenders for the CL. Number 10 is a symbol of loyalty and leadership, I would give it to Gigi, Chielini, Bonucci or Marchisio because they're the only ones that represent the true Juventus values.