Anthony Joshua has uploaded a remarkable mini-documentary to his YouTube channel, reliving his first career defeat.

Britain’s former unified heavyweight champion was dethroned by Andy Ruiz Jr in a massive upset last month, but believes he can rectify this in the rematch.

AJ’s 16-minute video shows new footage from his training camp, as he insists he had no problems leading up to the bout. It then runs through his knockout loss, with him narrating over each part of it to give an insight into what was going through his head at the time.

At the conclusion, Joshua declares: “True failure is in quitting, I don’t think you should give up when you meet a blip in life.

“Ruiz. I feel like I can get it right. That’s why I wanna take this rematch…

“My ambition in boxing at the minute is to be two-time heavyweight champion of the world.”

Watch the video below