Mario Balotelli celebrated his Milan debut by scoring twice in a 2-1 win over Udinese last night but the match ended in uproar over the penalty which led to his winning goal three minutes into stoppage time.
Police stepped in to protect the referee from furious Udinese protests after yet another in a series of hugely controversial decisions which have marked Serie A this season.
Italy striker Balotelli, who had opened his account in the 25th minute three days after completing his £19.5m move from Manchester City, converted with the last kick of the match after the referee judged that Stephan El Shaaraway had been fouled.
El Shaaraway tumbled theatrically in the area after being tackled by Thomas Heurtaux but the referee pointed to the spot amid Udinese disbelief and "Supermario" converted.
Giampiero Pinzi had levelled for Udinese early in the second half after Balotelli opened his account when he turned in El Shaaraway's cross from six metres.
Leaders Juventus won 2-1 at Chievo, restoring their three-point lead at the top of Serie A. Prior to the match the travelling Juventus fans had sang sickening songs which joked about Balotelli's death.
They chanted: "If we jump Balotelli will die" several times throughout the match.
Alessandro Matri volleyed home after 10 minutes and Switzerland midfielder Stephan Lichtsteiner finished a well-worked move three minutes before halftime for Juve, whose new signing Nicolas Anelka was left on the bench.
Cyril Thereau pulled one back for Chievo early in the second half but Juventus, with coach Antonio Conte barred from the touchline for his furious outburst over the refereeing against Genoa, held out comfortably.