"Now we need to take a moment and coordinate ourselves: we have a problem of public order and as such it must be managed, as well as the fact of playing or not.

"What happened is very bad. The referee will write what it is, if he has made some mistakes he will be evaluated too.

"I'm not a psychologist, but it's clear that some of the players were very nervous at San Siro."

Deputy Italian Prime Minister Matteo Salvini wrote on Twitter: "In 2018 you can not die for a football match.

"At the beginning of the year I will convene the leaders of supporters of Serie A and B clubs... so that the stadiums and the surrounding area will once again become a place of fun and not of violence."

Napoli head coach Carlo Ancelotti wanted the game at Inter suspended because of the abuse Senegal international Koulibaly was allegedly subjected to.

With nine minutes left, Koulibaly was dismissed for sarcastically applauding the referee after a caution, and substitute Lautaro Martinez went on to score a late goal that handed Inter a 1-0 win.

"It's a shame because twice we asked for the match to be suspended for the racist chanting towards Koulibaly," Ancelotti told the club's official website.

"It shook him – he's a good-mannered player and he was bombarded by the stadium. Despite our requests and the chanting, the game wasn't suspended. I think it should have been. Next time we'll stop playing ourselves.

"It was impossible for him to be calm – he cares a lot about the issue of racism and he commits a lot of time to the matter, including in society. What happened is unacceptable – not just for us but for Italian football as a whole."

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