Andy Ruiz Jr has apologised to Eddie Hearn for beating Anthony Joshua when they met on June 1 this year ahead of their December 7 rematch.
The Mexican was a late replacement after Jarrell Miller dropped out of the fight having failed drugs tests.
Against all odds, Ruiz knocked out Joshua to take his WBA, IBF & WBO heavyweight world titles.
“I just needed that right moment and the right chance to prove who Andy Ruiz really is.
“So thank you Eddie Hearn for giving me this opportunity and I’m sorry for beating Anthony Joshua.
“And that’s what we’re planning to do on December 7 again, so don’t get your hopes up because this chubby kid is training really hard.”
The rematch is billed for December 7 in Diriyah, Saudi Arabia.