A quick, hard-working, tenacious and powerful player, who excelled in the air and at anticipating his opponents, he combined his aggression, stamina, and ability to read the game, as well as his physical, mental, and defensive skills, with a notable confidence and good technique on the ball, which also allowed him to play in midfield throughout his career; indeed, after moving to Milan, although he initially started out playing as a centre-back or sweeper, and occasionally even as a full-back, he was later deployed as a defensive midfielder, a position in which he also excelled, successfully filling the void left by the departure of Frank Rijkaard due his ball-winning abilities and capacity to start attacking plays after winning back possession.