Anthony Joshua to fight Joseph Parker at the Principality stadium in March

"I think it's very important that Joe is very fast on his feet and very mobile in this fight against Joshua". It was the biggest heavyweight fight in British history.

Cardiff's Principality stadium - where Joshua successfully defended his titles against Carlos Takam in October - will host the bout.

A seemingly unimpressed Joshua told Sky Sports: "In sports you've got the likes of Roger Federer, Andy Murray, Lewis Hamilton, Cristiano Ronaldo, [Lionel] Messi, LeBron James, and then you've got people like Joseph Parker, so he's not a respectable type of person, he can't control himself". We've been thinking about this fight, we've been visualising Joe in the ring with Joshua.

Parker, 24, has won all his 24 pro fights, winning 18 by stoppage.

WBO champion Joseph Parker said he was relieved the contractual negotiations had now been concluded as he could now fully concentrate on the job in hand.

Parker is set to bank about $12million from the fight (not $30m as mentioned in some recent reports) - and even more in the rematch should he be successful - he said money wasn't a motivating factor.

"Well, now he's about to find out".

After 20 straight victories, all by knockout, Joshua hopes to take another step towards becoming the undisputed world heavyweight champion. My entire existence is now devoted to proving what the boxing world already knows'.

The 28-year-old Briton holds the IBF and WBA belts, while the 26-year-old New Zealander is the WBO champion.

"I'm delighted to get this fight made - it's been a long time coming", Hearn said.

The American, whose three-year reign as champion is the longest in the division, wants a fight with Joshua, calling the British Olympic gold medal victor out after beating Bermane Stiverne in November.

"It's the first time in history that two reigning heavyweight world champions have met in Britain".

It is a unification Heavyweight championship fight, we all know what happened last time I was in a unification Heavyweight championship fight against Wladimir Klitschko past year.