Nainggolan is more realistic than SMS. We already know he's rejected bigger clubs because he likes the Italian lifestyle. He's also softened his stance against juve in the past year or so. He has history with Allegri, who gave him his first real shot to play at Cagliari. Pjanic is his best friend. Eventually he's gonna get tired of losing. My prediction is Nainggolan to Juve in the summer.
Buffon or Szczesny (not convinced buffon will retire)
Spinazzola Rugani Chiellini Sandro
Nainggolan Pjanic
Bernardeschi Dybala Mandzukic
Higuain