HEAVYWEIGHT Joseph Parker was supposed to be the main event, but the fight night in Invercargill, New Zealand, exploded well before the Kiwi stepped into the ring.

The Stadium Southland erupted when little-known Polish boxer Izu Ugonoh administered the perfect knockout blow.

The fighter of Nigerian descent’s hook pounded opponent Will Quarrie out of the ring and onto the fight officials’ ringside table.

WATCH THE INCREDIBLE KNOCKOUT IN THE VIDEO PLAYER ABOVE

Ugonoh’s spectacular punch ended the fight in the second round.

The video travelled around the world in a matter of minutes. It was posted on social media site Reddit hours after the fight and was a hot topic on Twitter.

The 27-year-old is a former kickboxing world champion in the 91kg class before beginning his boxing career in 2010.

Ugonoh has been a training partner of Joseph Parker as the Kiwi prepared for his main event fight with Bowie Tupou. Parker also delivered a stunning knockout, taking just 63 seconds to send a message to the rest of the heavyweight division.

Aussie Tupou, could not last beyond the first round before the world No. 8 heavyweight scored a devastating first round KO. Earlier in the night, Aussie Jeff Horn scored the biggest win of his career to date with a points decision win over Ukraine boxer Viktor Plotnikov.

The fight was stopped after seven rounds because of an open wound on the Aussie’s face caused by an accidental clash of heads. Fellow Aussie Jai Opetaia won his first professional fight, a four-round decision over New Zealand’s Isileli Fa.