The "Fight of the Century" barely made it to the second round at Mystery Creek in Hamilton.
In a remarkable comeback in the main heavyweight fight, David Tua knocked out Shane Cameron within seven seconds of the start of round two.
Tua had already rocked Cameron late in the first round then came right back in the second, delivering a blur of punches, 13 in all, including several as Cameron slumped to the ground against the ropes before the referee separated the fighters and declared Tua the winner.
Tua's camp is already talking up another tilt at a world heavyweight belt.
His trainer Roger Bloodworth thinks Tua's ready for a title fight right now but is picking another warm-up bout before Christmas first.
On the undercard on Saturday night, the Australian heavyweight boxing champion John Hopoate suffered a stunning fourth-round knockout loss to veteran Colin Wilson.
In an eventful slugfest, Wilson climbed off the canvas in the third round and floored Hopoate late in that stanza then stunned Hopoate with a shot to the body and then delivered the coup de grace with a decisive left-hand punch to the head.