WBO heavyweight champion Joseph Parker (24-0, 18 KOs) is putting together what he believes will be the perfect strategy to defeat IBF, IBO, WBA world champion Anthony Joshua (20-0, 20 KOs).

The two undefeated beltholders will collide on March 31, at Principality Stadium in Cardiff, Wales.

Parker is convinced that Joshua's has a "glass jaw" and plans to expose it in the fight.

He also believes that a lot of Joshua's opponents were scared and mentally lost before they stepped in the ring.

"He's dominated fighters that stand in front of him, that don't move - all they do is protect themselves and I think a lot of fighters already go into the ring scared because of the power he possesses," Parker told Radio Live.

"I want to fight a fight that's going to be a fast-paced fight... movement, speed and just different angles - I think that's how we are going to attack Joshua."

Leading into the fight, there was a lot of trash talk going from Parker and his handlers.

Parker admits that most of the comments, and the antics like staging a press conference to discuss Joshua's chin, were strategic acts to ensure that a deal was finalized that satisfied both parties in terms of the finances.

Joshua was very offended by some of statements - but Parker believes the British superstar has already been mentally "rattled"

"How odd was that, that he said we were trying to 'demonise' him," said Parker to The Telegraph.

"He's rattled. Where he got that word from, where he got that idea from, I just don't know. It was nothing about demonizing him. We just stated the truth about him. He's been knocked down a ton of times in sparring.

"My team came up with the strategy of trying to lock in the deal after he had said that he wants to win all the belts. That was it."