Koulibaly is a physically dominant center-back, known for his strength and ability to win physical duels with ease.

His aerial presence is excellent, making him reliable during defensive headers and set pieces.

He has strong tackling skills, capable of winning clean challenges in both standing and sliding situations.

His defensive awareness and positioning are very good, allowing him to anticipate plays and block key passes or shots.

He has solid composure and passing for a center-back, helping with calm build-up from the back.