Pep Guardiola's not going to win a trophy for the first season in his career, and after a year of trying his best to work with Manchester City's assortment of players, he's likely to want to build his team in earnest this summer.
Top of the list is a top quality, reliable defender to pair John Stones with, and Guardiola's made absolutely no secret of his appreciation for Juventus' Leonardo Bonucci.
The best passing center back in the world, it makes sense that he intrigues Guardiola, and he'd likely be the perfect mentor for John Stones.