Hearn: I'm worried about Andy Ruiz, it's a bad style for Joshua

It remains less than a week before WBO heavyweight champion Anthony Joshua, IBF, IBO, WBA and WBO make his debut in the United States.

The contest takes place on June 1st at Madison Square Garden in New York.

Joshua will face Andy Ruiz, once defeated, who agreed to fight at the last minute after his original opponent, Jarrell Miller, was removed from the game after being tested positive for performance-enhancing drugs.

Hearn is worried about the fight, explaining that Ruiz's fighting style is not favorable to Joshua.

"It's a bad style for AJ," Hearn told The Express. "Because you look at the little guys he's been fighting – Takam, Povetkin – he's struggled a bit with that style, Ruiz is a lot faster than these two guys, he probably does not hit as hard as Povetkin, but he has pop.

"What I like about Andy Ruiz is that I do not even think he has the chance that comes his way now. He will just have fun. He will let go of his hands, he will try a Mike Tyson style; go inside, work Joshua's body, let the big hook go over. It's going to be an exchange of fire. Joshua must be on this subject. Everyone is talking about Deontay Wilder, the undisputed fight, "when is it happening?"

"Worried for Andy Ruiz. It's a problem next Saturday. In this game of heavyweights, you look away from the ball, like that (he clicks) that it's over, and we can forget these fights. "

Hearn wants Joshua to react forcefully to the recent victory of the WBC heavyweight champion Deontay Wilder, who knocked out Dominic Breazeale in a round on May 18th.

"The pressure is on Joshua," said Hearn.

"We had a good performance from Wilder [against Breazeale] A week ago, Joshua must now light the fire. He must achieve a dominant performance against Ruiz and knock him out. "