Masked men chased down their victim and attacked him with machetes, a court has heard.
Ryan O’Connor, 26, died after being attacked and robbed on Balfe Road, Newport, on 10 June last year.
Four men and a 17-year-old boy are accused of his murder.
Lewis Aquilina, 20, Elliott Fiteni, 20, Kyle Rasis,18, Ethan Strickland,19, and Joseph Jeremy, 17, deny murder, manslaughter and robbery.
The jury at Newport Crown Court was shown a video statement from witness Lewis Pritchard who spoke to police the day after the stabbing.
He told an officer that at about 20:40 BST on 10 June 2021 he saw a blue Ford Fiesta ST on Aberthaw Road, Newport.
Mr Pritchard said the car caught his attention because he believed it to be the same one he had seen on Facebook that morning, in a post that said it had been stolen in Risca the night before.
Mr Pritchard said the car slowed down as it passed, and he saw the driver in a black balaclava and black hoody before it sped off towards Aberthaw roundabout.