Trouble follows Stadio Olimpico final
Rome's Stadio Olimpico will host the Champions League final between Manchester United and Barcelona on May 27 despite several episodes of violence in the city in recent years.
Police said three arrests had been made before and after Wednesday's Italian Cup final at the Olimpico but added that five police officers had been injured.
Rome club Lazio won 6-5 on penalties having drawn 1-1 after extra time.
At the weekend, Rome mayor Gianni Alemanno played down fears of a police strike over pay and conditions during the Champions League final.
In a separate matter, judicial sources in Italy also said the Naples villa of Real Madrid defender Fabio Cannavaro, who is poised to move back to former club Juventus, had been seized for a third time by authorities because of construction offences.