In the pre-fight festivities to build up their match, WBO heavyweight champion Joseph Parker has been highly critical of Anthony Joshua's ability to take a punch.

Joshua will stake his IBF, IBO, WBA world titles against Parker on March 31, at Principality Stadium in Cardiff, Wales.

Parker and his handlers have labeled Joshua as a "glass chin" fighter.

Because of their belief that Joshua has a "glass chin" - Parker and his team are very confident that the British superstar will never see the final bell.

One of the boxers who tested Joshua's chin and dropped him hard in sparring, is Olympic bronze medal winner David Price.

During a sparring session in 2011, Price dropped Joshua hard enough to effectively end their sparring session. It was the only time the two heavyweights had sparred each other.

"I remember it well. I landed a hard shot, a good shot. Similar to the shot Wladimir Klitschko landed on him. I caught Joshua with a throwaway left hook. I sold him that, then caught him with a big right hand," Price told Sky Sports.

"He fell forwards, on to his face. He went down heavily. He tried to get up but was on unsteady legs, and the trainer pulled him out. He got helped out of the ring. I don't knock many people out in sparring, with those big gloves. When I did that to him, I wondered: is he fragile? Then I heard he was stopped in the European Championships."

At the same time, Price doesn't see that incident as being a black cloud for Joshua's ability to take a shot.

"There was no shame in it. I've done that to a lot of people. It happens. If he was knocked down by a light puncher, or a light-heavyweight, then yes," Price said.

"That's why I'm saying the Parker side seem to be clutching at anything they can get to throw mud around at Anthony Joshua. But from a boxing standpoint he has done everything right so far."

"Now, he's proving to be okay. He didn't go into a shell, and he isn't gun shy. He got rocked by Dillian Whyte and put down by Klitschko, but he can hold a shot," Price said. They are clutching at straws. It's funny that the world champion is having to justify his chin."