That was the third time Cagliari have been investigated for alleged racist abuse in the past two years. Previous cases involved Moise Kean, the Italy forward now at Everton, and France midfielder Blaise Matuidi, Kean's then Juventus team-mate - but no action was taken on either occasion.
"Racism is combated with education, condemnation and discussion," added Infantino.
"You need to identify those responsible and throw them out of the stadiums. You need, as in England, the certainty of the penalty. You can't be afraid to condemn racists, we need to combat them until they stop."