A man is in a serious condition after being bashed and stabbed near the Melbourne Park tennis precinct.
The man in his 60s was found near a pedestrian bridge at Batman Avenue just before 7.30am on Friday after a fight with an unknown attacker.
He suffered significant head injuries and a possible stab wound during the fight, police say.
A digital image of a man and a bag he was carrying at the time of the assault has been released by investigators.
The victim was taken to the Alfred Hospital and remained in a serious condition late on Friday afternoon.