"In Pep's game, a good midfielder playing as a defender can bring the ball out with force, like a catapult and that gives tremendous impetus to the rest of the team."
- Domenec Torrent
"He knows how to hold the ball if there's a problem, he's fearless about dribbling past the first line of press - if he's part of the 3 bringing the ball out from the back he gives us a lot of security. I really think he could be the perfect Central Defender for us. He has no fear of going forward. None at all."
- Guardiola
Both descriptions are about Joshua Kimmich from the new Guardiola book, but I reckon they shed light on why Pep was so keen for Stones specifically. He doesn't have superb passing ability like Boateng or Bonucci and some other "ball playing" centre-backs, but the one thing he does really well, possibly even better than them, is come out of defence "with force" and carry the ball past the first player into midfield and obviously Guardiola and co. value that massively.