Anthony Joshua cautioned"I have another opportunity" as he went face to face with Andy Ruiz Jr in a press conference in New York.
Where Ruiz Jr shocked Joshua earlier this year, before the rematch on December 7 in Saudi Arabia, live on Sky Sports Box Office the heavyweight rivals met in town.
IBF, WBA and WBO title-holder Ruiz Jr, wearing a sombrero, just broke in an extreme face-off when he noticed calls of"let's move champ" in the onlooking Shannon Briggs, the former heavyweight champion from New York.
Joshua previously said:"In my brief 11-year profession, by the amateurs to the pros, I've seen a great deal. I wouldn't say I've seen it all, but I've definitely noticed a great deal.
"There were times once I faced defeat as an amateur. My third struggle. Picture I stopped there would be. I dropped in the Championship quarter-finals. Envision I stopped then, there would be.
"I dropped in the World Championship finals. Imagine I stopped then, there will be. Stopping is not within my DNA. As long as I have breath, I will continue fighting and fighting the fire of boxing. That is where I belong.
"I had been born with a battling spirit. I understand how to battle.
"People say,'you lost your names'. I say,'to get rid of something is never to get it back'.
"I have a second opportunity on December 7. I used ton't have a warm-up struggle, I'm not gun-shy.
"Shannon Briggs talks about the days he had been out and down, and nobody believed .
"That's where'let's go champ' comes into my life right now."
Joshua then called on Briggs to shout his catchphrase and that then he responded with a loud:"Let us go champ!"
Ruiz Jr said in New York:"That is really where I became the first Mexican heavyweight champion of the world.
"But I know Joshua needs his straps back. I know how it feels to drop - I dropped to Joseph Parker once I thought I'd won. Joshua can bounce straight back . My occupation isn't to allow him get back the straps.
"I've had doubters my whole life, telling me I would do nothing for my look. Because of the way I looked.
"Individuals can now say,'when he did it, I can do it'."
Promoter Eddie Hearn included:"That is a gorgeous, savage sport and each fighter deserves admiration but both of these are good role models and great ambassadors. This may be the heavyweight occasion of our creation."
Joshua and Ruiz Jr fulfilled to a media tour's first leg. They reconvene in London on Friday.