MORE: 'The Man' Mundine KO'd by Hatley
Tuck hit the canvas early in the fourth round against Lucas Miller - who was only in his second professional fight.
The 33-year-old was given oxygen as he was stretchered out of the Melbourne Convention Centre - but had regained consciousness by the time he entered the ambulance.
Former AFL player Shane Tuck is conscious and talking. About to leave the venue by ambulance #boxing #mundinehatley pic.twitter.com/m0SRu6gOwB
— Ben Damon (@ben_damon) November 11, 2015
Tuck was kept in hospital overnight for observation.
Watch the brutal knockout below: