I think Newcastle's demands are out of reach for Italian clubs. Sandro is worth €80-€100 million, who can afford that? I hope he stays in the Premier League, or at least at a top-flight club. Then everyone's hope is a return to Milan, but right now that's impossible.
And my feeling is that this is a deal that Arsenal would be prepared to advance and explore quite seriously if Tonali opens the door and says, 'I want to leave Newcastle and I'm prepared to stay in England.' This suggests Arsenal's interest hinges on Tonali's explicit commitment to the move and remaining in the Premier League.
The Spanish club is interested in signing the International and they are preparing to offer around 75 million in order to sign him, as per TuttoJuve. The 25-year-old has established himself as a key player for Newcastle, and they will not want to sell him easily. It will be interesting to see if Real Madrid can convince the Premier League club.