How does AC Milan defend under manager Stefano Pioli

Stefano Pioli is an Italian football manager and a former footballer who played as a defender. He is the head coach at Serie A club A.C. Milan. 

Associazione Calcio Milan, commonly referred to as A.C. Milan or simply Milan, is a professional football club in Milan, Italy, founded in 1899. The club has spent its entire history, with the exception of the 1980–81 and 1982–83 seasons, in the top flight of Italian football, known as Serie A since 1929–30.