The career of Anthony Joshua opens possibly it's most exciting chapter next Saturday evening.

The London-born fighter taken on Joseph Parker in Cardiff, a bout which is seen by some as his biggest to date.

Wladimir Klitschko was, of course, a huge victory and step for AJ, but Parker represents a top fighter at the peak of his powers, something which Joshua is yet to really face.

Should he emerge victorious against Parker - which is anything but a formality - Joshua will have taken another step further to unifying the division by taking the Kiwi's WBO belt, with Deontay Wilder's WBC accolade the last needed to get the job done.

A fight against Wilder would be huge for both British boxing and the heavyweight division and if Joshua were to win, he'd only have one opponent left to defeat; Tyson Fury.

The Gypsy King is close to his return and has said on numerous occasions how much he wants to dethrone AJ.

However, Eddie Hearn has dropped a potential bombshell on the prospect of the all-British bout, hinting that Joshua could 'retire' before Fury gets his chance.

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"Tyson Fury is a fight we'd love to make, the biggest fight in British boxing," said Hearn. "The other fight is the Wilder fight. The Wilder fight is the one that gives him the undisputed heavyweight championship of the world. That's different level, that doesn't happen anymore.

"Listen, AJ may retire after winning all the belts, who knows? He's smart enough to know that, when he loses that desire, he won't do it. I can't see that happening any time soon until he gets to the top of the mountain. That's when you might look round and say: 'I've done everything'.

"Joshua wants to fight Tyson Fury for many reasons. There's still the element of 'Tyson did that first with Klitschko so he's the real champ'. I don't necessarily believe that.

"That competitor in AJ is desperate to fight Tyson Fury and, if Tyson gets himself back on the horse, we will make that fight happen."

It's a thought that has crossed very few peoples minds. If Joshua claimed victories over Parker and Wilder to unify the division, who's to say he'd have that desire to risk it all against Fury?

Hopefully, Joshua's 'desire' motivates him for what would be a ground-breaking moment in British boxing.