Usyk beat Joshua in September 2021 and then beat him again in August 2022 to claim the WBA, IBF and WBO heavyweight titles.
Joshua was reported to have stormed out of the ring and started to head back to his dressing room, before changing his mind and returning to the ring.
He then took the microphone and gave a bizarre, yet passionate, speech, reports say.
After the match, Usyk claimed that he was not bothered by Joshua’s post-fight antics, but has now come out to blast Joshua.
“You know, I thought, ‘What a poor fool’,” he replied.
“I thought, ‘Why should you be doing that?’ He reminded me of a little boy who wanted to play with the ball, but it was taken away from him.
“So, he decided to throw it over the neighbour’s fence. But the ball landed next to a fierce dog, so was it such a smart decision in the end?” (LIB)