A supporter of Rome "lashed out" against a Liverpool fan while falling to the ground during a joint attack in view of a Champions League semi-final,
Filippo Lombardi, 21, is accused of inflicting serious injury bodyweight to Sean Cox, 53, out of Anfield before the 24 April forward match.
The opening of the trial at Preston Crown Court on Thursday, Neville Biddle, continued, said: "Before the game, a supporter of Liverpool Sean Cox, a middle-aged man from Dublin who was a supporter of Liverpool throughout his life and who had come to Liverpool with his elder brother Martin, he was attacked and groundless unconscious and severely wounded. "
He added:" It is the crown that two men have been involved in the 39. Assault on Sean Cox ̵
"It was the other who hit the blow that knocked down Sean Cox and made him fainted.
"The Crown says this was a joint attack from the other man and the accused, they were both ac
The court was told a second man had been arrested in Rome and was awaiting extradition.
Mr. Cox's wife and other family members sat in the public forum for the beginning of the trial, along with about six members of the Lombardi family.
Mr. Biddle told Lombardi and the man shown in filming Mr. Cox, called N40, was leading a group of about 50 fans who walked from Liverpool Lime Street station to the stadium before the match.
He said: "A witness, Mykel Askew, was on Venmore Street when he noticed that the group of Italian fans walked all in the same direction approaching doses to the ground, many of them had their faces covered and were singing in Italian.
"He believed they were going to cause trouble
" Some members of the group were removing the straps and holding them in a threatening manner. " The court heard Mr. Cox, from Dunboyne, Co Meath, Ireland, and his brother had been outside the Albert pub when they heard the group sing and Martin Cox went away from them.
Mr Biddle said, "Even as he did so, he turned to see Sean Cox lying motionless on the ground. "
He said that shooting from CCTV and cell phones showed Lombardi raising his belt as if to hit Sean Cox, before the other hit him
He added: "While he is falling to the ground, the defendant lashes out at him as he falls.
"It is quite clear, say the Crown, the defendant and the N40 act together in a
He said that Lombardi was identified on footage by Italian officers and arrested before leaving the game.
Alison Gurden, in defense, said that Lombardi, who had an Italian interpreter with him in the dock, had admitted a crime of violent disorder and accepted his behavior following the attack on Mr. Cox "he exaggerated."
He said: "There is no dispute that Mr. Cox has suffered catastrophic injuries and it is clear that Cox has suffered those injuries due to the fact he was punched but Mr. Lombardi said he did not beat Mr Cox and does not agree to have attacked Sean Cox or his brother Martin Cox. "
He said that Mr. Lombardi had" no idea "N40 would assault Mr. Cox or anyone else in an unprovoked attack.  Some members of Mr. Cox's family left the court while the jury of six men and six women were shown a number of video clips of the attack on Mr Cox.  Detective policeman Philip Hankin said: " In Mr. Cox's fall process on the floor and on the landing, Mr. Lombardi, who is still wielding his belt over his shoulder, is making a shoulder-belt strike out in front of him in the direction of Mr. Cox. "
He said it was not possible to determine if the belt was in contact with Mr. Cox.
BBC footage showed Martin Cox standing on his brother while lying on the floor after the attack was kicked from one of the Italian fans, who brought it down
The trial should last until next week