Joseph Parker's boxing promoter says he's looking at his options after an illegal live stream was viewed by thousands for free on Facebook.
A page on the social media network streamed the match for free, while Sky TV's Arena channel charged $49.99 for the pay-per-view event.
New Zealand heavyweight Parker won the International Boxing Federation (IBF) eliminator against the France-based Cameroon fighter Carlos Takam by a unanimous points decision over 12 rounds.
Duco Events will be working with Sky TV to find out who streamed the fight without permission, Duco co-owner Dean Lonergan said.
"If you take 21,000 by $49.95, that's close to a million dollars," Lonergan said.
"When we find out who they are, there'll be pending legal action so there's not a lot we can say at the moment."
"I'm talking extensively with our business partner Sky TV on this, it's an ongoing issue for them but there will be legal action being pursued."
Sky TV is making no comment on the incident other than to say it constantly monitors illegal streaming.
Parker will now get a shot at the IBF world title.