Joseph Parker left visibly stunned after being told what Daniel Dubois was doing on the day of his fight against Oleksandr Usyk

Former world heavyweight champion Joseph Parker was left in disbelief after being told of what Daniel Dubois was doing on the day of his blockbuster title fight with Oleksandr Usyk.

On Saturday, Dubois rematched the undefeated Ukrainian in front of 90,000 people for the huge undisputed heavyweight championship fight.

But 'Triple D' suffered a devastating knockout defeat, with a brutal left hook in the fifth round handing him his third career loss.

And stunning reports have emerged concerning Dubois' preparation for the bout, with Simon Jordan of talkSPORT claiming that Dubois' dad held a pre-fight party at their family mansion in Essex.

Dubois arrived at Wembley at around 8.20pm, less than two hours before his ring walk, in what appears to have been a chaotic period prior to his encounter with one of the greatest boxers of all-time.

His lateness brought fears that a last-minute withdrawal or cancellation could be on the cards.

"This is what I've heard," Jordan said on the talkBOXING show.

"There was a party at Daniel Dubois' house, ordered by his father, with about 70 people. The day of."

Parker, the former WBO heavyweight champion who is on a six-fight winning streak, was a guest on the show and asked, "Was Daniel there?".

Jordan then revealed that the 27-year-old was in attendance and with many people there "not known" to him, he "asked his father if he could go out for a drive because he didn't know anybody there".

Parker branded the revelation "insane", before Jordan added that members of the entourage were present outside Wembley but were not being allowed in - and claimed Dubois' father threatened to pull him from the fight unless they were granted access.

That piece of information caused Parker to chime in, commenting: "That is a different story altogether, that is insanely disruptive".

At the end of the segment, former Crystal Palace owner said that "there is a balance between being an influence and a destructive force" when discussing the involvement of Dubois' father.

Footage of alleged Daniel Dubois party emerges

Clips purported to be from the alleged party in question were widely shared on social media, with Dubois, wearing a green Montirex t-shirt that he was seen wearing when he turned up for the fight, mobbed in his gym and posing for pictures while his 'Cameo - Candy' entrance song played.

A large group of people could then be seen outside the house, where vehicles were present on the driveway.

Dubois' team are yet to comment on the claims.

Meanwhile, undisputed champ Usyk was at Wembley at around 7pm to support some of his friends who fought earlier on and relaxed by reading a book in his dressing room before claiming another incredible win.