I love to see a full back who is so strong defensively.
Calabria has evolved like few players I've seen. I used to think he was hopeless (when the debate on who was worse between him and Conti), he was always losing the ball cheaply and his positioning was off. Now he is the complete opposite player, he is so strong one vs one, defensively and sometimes offensively.
Great story, he reminds me of Puyol in his early years with Barca.. I hope he can have a similar career I think he has a similar character.