Roma added that one of their youth players has undergone shoulder surgery after being "physically struck" by Zaniolo - who was in the stands for the youth game.
A statement on the club's website reads: "On the evening of May 26, following the Primavera semi-final match Fiorentina vs AS Roma at Viola Park, Nicolo Zaniolo (Fiorentina first team) unlawfully entered the Roma dressing room area accompanied by an associate, despite lacking accreditation. Witnesses report Zaniolo appeared visibly intoxicated. He urinated in Roma facilities, provoked players, and, without verbal exchange, physically struck Mattia Almaviva and violently pushed Marco Litti against a bench. Litti had recently undergone shoulder surgery. Both players required hospitalization: Almaviva received a 10-day recovery prognosis, Litti 21 days. AS Roma stands firmly by its youth players and is appalled by the violent and unjustifiable behaviour witnessed at Viola Park. We trust that the institutions will act decisively to ensure accountability and protect the values of Italian football."