Police said that the student, who was also a cabbie, was attacked and left to bleed on a Brunswick West street.
According to The Age report, the victim parked his taxi outside his girlfriend's home on Collier Crescent in the wee hours and rang her to bring his dinner outside when someone approached his vehicle.
"His girlfriend heard the driver scream out over the phone as he was attacked," police officer Greg Johnson was quoted as saying by the paper.
The woman ran outside and found her boyfriend lying outside the car, bleeding with a single stab wound to the chest.
"Police do not believe the attack was racially motivated or an attempted robbery as the man still had cash in his pocket and his mobile phone," the paper said.