Tyson Fury versus Anthony Joshua being planned for December by promoter Hearn despite Gypsy King announcing retirement

EDDIE HEARN claims Anthony Joshua vs Tyson Fury could be ON for December.

AJ's promoter is planning the biggest fight in British boxing history, even though Joshua first needs to dethrone his conqueror Oleksandr Usyk and the Gypsy King must reverse his decision to retire.

Hearn said: “I think you’ll see Joshua-Fury whatever happens, in all honesty.

“But hopefully we can see it for the undisputed world heavyweight championship in December.”

Joshua's rematch with Ukraine's unified world heavyweight champ Usyk seems sure to be switched from July 23 to mid-August at the earliest.

And although unbeaten Fury has vowed never to fight again he has stayed in training.

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The 33-year-old lethally KO'd Dillian Whyte in the sixth round last time out in front of 94,000 fans at Wembley Stadium in April.

The Mancunian said last month: "I am very happy and contented to be retired.

"It's been a long time coming and I am so much enjoying my retirement."

But many doubt his word - particularly if a dazzling sum was dangled in front of his eyes to take on Joshua.

So the biggest obstacle could be AJ toppling Usyk, who comfortably outpointed him last September.

Watford hero Joshua, 32, claimed that defeat "mentally killed me".

And he knows his credibility at the very top is at stake when he targets revenge.