Melbourne West Police are appealing for witnesses after a man was assaulted in Parkville earlier this year.
It is alleged a ride-share driver was assaulted by a male passenger on Oak Street about 7pm on Thursday 9 January.
A taxi driver then came to the defence of the ride-share driver and was assaulted by the offender as well before he left the scene.
The male is perceived to be Caucasian with a thin build, unshaven and short dark hair.
Police have released an image of a man the believe can assist with their enquiries.
Anyone with information is urged to contact Crime Stoppers on 1800 333 000 or submit a confidential report at www.crimestoppersvic.com.au