Cordina faces a single charge of assault by beating relating to an altercation on 27 February involving Jamie O'Brien, who has already admitted a charge of assault by beating in connection with the same incident. A second assault charge against Cordina was dropped on Tuesday.
The court heard that the altercation came to light days later after a video filmed by a witness was published by Wales Online. CCTV footage played to Cardiff Magistrates' Court showed Cordina filling up his car and then walking over to O'Brien, who was standing on the pavement nearby.
Prosecutor Alex Orndal said O'Brien pushed Cordina with his shoulder, after which Cordina punched him with sufficient force to knock him to the ground and then pushed him repeatedly. "Mr Cordina has initiated the confrontation," Orndal told the court. "Cordina was not protecting himself but retaliating."
The court also heard that O'Brien's sister told police her brother "hated" Cordina and that she feared he had "sought out" the boxer. During the incident, Cordina raised a golf club and O'Brien lunged at him before a number of blows were exchanged. O'Brien was eventually restrained and posed no further threat, the court was told. The trial continues.