Chelsea boss Maurizio Sarri says Italy can do more to eradicate racism from football after Kalidou Koulibaly was abused during Napoli's defeat at Inter on Wednesday.
Sarri was Koulibaly's coach in Naples until the end of last season and was replaced by Carlo Ancelotti following his move to Stamford Bridge.
Ancelotti claimed to have tried to get the match suspended on three occasions at San Siro and said his players could leave the pitch if similar circumstances occur in future.
Koulibaly was sent off late on after sarcastically applauding the referee following a booking, with Lautaro Martinez then scoring a stoppage-time winner.