On Wednesday Horn will voluntarily defend his title against London-based Irish Traveller Gary Corcoran, where he's set to make $1 million for the fight, however, a much bigger paycheck is on the line for Horn.
Corcoran was left struggling to see out of his left eye late on and referee Benjy Esteves Jr. had seen enough in the mid-part of the eleventh.
Awaiting Horn now are potential megafights with the likes of Keith Thurman, Errol Spence Jr or Terence Crawford.
By the 11th round, with more cuts on his face opening up, Corcoran's corner called off the fight, as Horn - exhausted but unbeaten - raised his arms in celebration, before being embraced by coach Glenn Rushton. Gary's a very awkward fighter which put me off my game in the early rounds.
Horn, who could fight boxing warrior Terence Crawford next in the United States in a mouthwatering clash, said: "I knew he was prepared, he talked a smart game, and he definitely pushed me".
I am of the opinion that Corcoran will have punched himself out by the eighth round and that will give Horn the opportunity to finish the fight - similar to how he did when he beat Randall Bailey.
"I didn't know who Jeff was at the time".
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I've tried really hard not to feed into anything and just kind of try to do local because I wanted to keep my children grounded". If i could take it back I would". "It's been a dream of mine since I was little for Captain America to know who I am".
Asked about Crawford, Horn said: "It's a big possibility". On television it's a little hard.
Jeff Horn goes toe to toe with Gary Corcoran during the WBO Welterweight Championship bout in Brisbane.
"I wasn't really hurt in the fight, I just couldn't see".
What are your thoughts on Khan's intentions to possibly fight Horn sometime next year?
Also on the bill, welterweight Leonardo Zappavigna moved to 37-3 with a third round victory over Nestor Faccio, whilst undefeated super featherweight Paul Fleming took Vergil Puton out in the seventh.
Leapai, who took on Wladimir Klitschko for the world heavyweight title in 2014, demanded a rematch against Izonritei.
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