Twenty-five year-old Fau Vake, is a fighter at City Kickboxing, is in a coma after being punched from behind in Symonds Street during the early hours of Sunday morning.
Vake is one of the main training partners of UFC champion Israel Adesanya, who is leading the call for tougher laws for such attacks.
Four people have been charged by the police in relation to the incident.
City Kickboxing head coach Eugene Bareman told Morning Report the law needs to change.
