The British fighter went head-to-head with the Ukrainian boxer in their anticipated heavyweight rematch last night (20 August).
While AJ put on an improved performance compared with their first bout last year, he wasn't able to keep pace with Usyk at the Jeddah Superdome in Saudi Arabia and he lost via split decision.
Viewers were left baffled by his post-fight behaviour, as he was seen storming off after throwing two of the belts out of the ring, only to return and deliver an unusual speech.
The new footage from iFL TV shows a seemingly jovial AJ smiling and laughing with his entourage and bystanders as he walked back to his dressing room after the fight.
But the mood soon took a turn when a fan was heard shouting at the boxer, telling him to 'keep it professional'.
Joshua was filmed angrily replying: "Who are you talking to? Who the f**k are you talking to? Are you mad?”
His security team kept things moving and escorted the athlete back to his dressing room.
Anthony Joshua lost his temper after losing his rematch to Oleksandr Usyk and reacted angrily by throwing two belts out of the ring. 🚨pic.twitter.com/VjS8z3UrGl— Sky Sports News (@SkySportsNews) August 20, 2022
The clip arrives after the athlete's defeat when he delivered a passionate speech just moments after storming off stage.
"I am giving you my story," Joshua told the crowd.
"I was going to jail. I got bailed and started training my arse off, because if I got sentenced then I would not have been able to fight.
"I could have done better, but it showed the hard work he must have put in to beat me.
"Please give him a round of applause as our heavyweight champion of the world."
He continued: "I’m not a 12-round fighter. I am a new breed of heavyweight, Mike Tyson, Sonny Liston – they say, 'He doesn’t throw combinations like Rocky Marciano', because I am 18 stone, I am heavy.
"It is hard work. This guy here is a phenomenal talent. We are going to cheer for him."
Anthony Joshua makes an impassioned speech to explain his post-fight frustrations and congratulate his opponent. 🗞️ pic.twitter.com/D66PoLaudZ— Sky Sports News (@SkySportsNews) August 21, 2022
Fans were just as baffled by the new clip of him lashing out at the bystander, with one writing in the comments section: "'Stay humble' while throwing 2 belts out the ring in a hissy fit."
Another said: "Put on a decent show and has utterly and completely humiliated himself after the fight."
Others, however, defended the boxer, including this person who wrote: "Everyone wanted AJ to stop being so media trained and as soon as he stops everyone get on him!"
Featured Image Credit: iFL TV/YouTube