WBO champion Joseph Parker flies to UK to sign Anthony Joshua fight contract

Kiwi WBO champion Joseph Parker is flying out to the United Kingdom to sign a contract to fight Britain's Antony Joshua for three world heavyweight belts.

Parker's promoter, Davie Higgins, is currently in England and seems to have finalised a deal with Joshua's promoter, Eddie Hearn.

The unification title fight is set to take place at Principality Stadium in Cardiff on April 1 (NZ time).

Parker hopes to finally put pen and paper and is already thinking ahead to the bout.

"It's not signed yet but hopefully with this trip to the UK we get it signed," he says.

"I'm happy with it. Our whole team has done a great job to be able to get to this step.

"The possibility of this fight happening, I've visualised happening - fighting Anthony Joshua and knocking him out - and that's what I'm going to do."

Parker's mum, Sala, who is also part his management team, is relieved the contract process looks to be over and has already been assured by her son of victory.

"A lot of meetings, on phone meetings, team meetings - it was a tiring thing to do," she says.

"But it's quite good now. It seems like we're an inch away from settling the deal.

"He's quite confident and said, 'Don't worry mum, I'm going to do the best I can, and I'm going to knock him out.'"